DITO SIM Registration

DITO SIM Registration

SIM registration in the Philippines is required under Republic Act No. 11934, also known as the SIM Registration Act. This law was created to stop the rise of text scams and fraud by making sure every SIM card is linked to a verified user. DITO SIM registration links your SIM card to your verified identity. By providing your details and a valid government-issued ID, your number becomes officially tied to your name.

The purpose of this process is clear: prevent illegal use of mobile numbers, improve accountability, and ensure that services like calls, texts, and mobile data continue without interruption. If you fail to register, your SIM may be deactivated, and you could lose access to your account.

It explains the requirements, the step-by-step process, the deadlines you should follow, and the consequences of not completing your registration.

Why is SIM Registration Important?

SIM registration is important because it protects users and strengthens mobile security in the Philippines. By linking your identity to your SIM card, the law ensures that every number is tied to a verified person.

One of the main reasons for registration is to prevent text scams and fraud. Criminals often use unregistered numbers to trick people through fake messages or phishing attempts. With registration, these activities become easier to trace, reducing the chances of scam texts reaching you.

Types of DITO SIM

DITO offers different types of SIM cards to meet the needs of various users. Each SIM type comes with specific features, validity, and usage benefits. Knowing the difference helps you choose the right SIM for your lifestyle or business needs.

1. Regular DITO SIM (Prepaid/Postpaid)

The regular DITO SIM is the most common option available for users. It comes in prepaid and postpaid plans, giving flexibility depending on your budget and usage. With this SIM, you can call, text, and use mobile data across the DITO network.

2. DITO 5G SIM (Faster Internet)

The DITO 5G SIM is designed for faster internet speed and lower latency. It is perfect for streaming, downloading, and gaming on 5G-ready devices. This SIM works best in areas where DITO’s 5G coverage is available.

3. Tourist SIM (Short-Term Use)

Tourist SIMs are made for foreign visitors staying in the Philippines for a limited time. They usually come preloaded with data, calls, and texts, making it convenient for short-term communication. The validity depends on the package chosen but can sometimes be extended.

4. Corporate SIM (For Businesses)

Corporate SIMs are offered to companies that need multiple lines for employees. They include bulk registration, flexible billing, and business-focused plans to ensure reliable connectivity for staff under one account.

Who Needs to Register a DITO SIM?

All DITO SIM users are required by law to complete registration, no matter what type of account they have. The SIM Registration Act makes it mandatory for new subscribers, existing users, foreign nationals, minors, and even companies to link their SIM cards to verified identities. This rule ensures that every mobile number in the Philippines is traceable, secure, and protected from misuse.

  • New DITO SIM Users: If you buy a new DITO SIM, you must register before activation. Without registration, the SIM will not work for calls, texts, or mobile data.
  • Existing DITO SIM Users: Current DITO subscribers must register before the government’s deadline. Failing to do so will result in deactivation, and you may lose your mobile number permanently.
  • Foreign Nationals: Visitors and foreign residents in the Philippines are also required to register their SIM cards. Accepted documents include a valid passport, visa, and proof of stay such as a return ticket or accommodation details.
  • Minors: For users below 18 years old, the SIM card must be registered under a parent or legal guardian. The guardian’s valid ID and consent are needed to complete the process.
  • Corporate Users: Companies using bulk DITO SIM cards must register them under the business name, along with supporting documents such as a certificate of registration and an authorized representative’s ID.

Documents Required for DITO SIM Registration

To complete your DITO SIM registration, you need to present a valid government-issued ID and provide your personal details. These requirements confirm your identity under the SIM Registration Act and ensure your mobile number stays active. Without them, your registration cannot be processed and your SIM may be deactivated.

Personal Information Needed

  • Full name
  • Date of birth
  • Gender
  • Complete address
  • Recent selfie or photo for verification

Government IDs

Passport

PhilSys ID or National ID

Social Security System (SSS) ID

Government Service Insurance System (GSIS) e-Card

Driver’s License

National Bureau of Investigation (NBI) Clearance

Police Clearance

Firearms’ License to Own and Possess ID

Professional Regulation Commission (PRC) ID

Integrated Bar of the Philippines ID

Overseas Workers Welfare Administration ID

Bureau of Internal Revenue ID

Voter’s ID

Senior Citizen’s Card

Unified Multi-purpose Identification Card

Person with Disabilities Card

Student ID

Other Accepted IDs

Philippine Health Insurance Corporation ID

Philippine Postal Corporation ID

Philippine National Police ID (PNP)

Armed Forces of the Philippines ID

Municipality or LGU ID

Security Guard License (issued by PNP)

Fisher Worker Identification Card

LGU ID (Tupad ID if covered by the DOLE ID System)

Retirement ID

Barangay Tanod ID

Health Worker ID

Agricultural ID

Conductor ID (issued by LTO)

Maritime ID

Navy ID

CAFGU ID (Issued by AFP)

How to Register Your DITO SIM

DITO SIM registration can be done in different ways, allowing you to choose the option that is most convenient. Each method requires your personal information and a valid government-issued ID to verify your identity. DITO SIM offers four main ways to register your SIM:

  1. Online Registration via Official Link
  2. Registration through the DITO App
  3. Registration via SMS (if officially supported)
  4. Registration at DITO Stores

How to Register Your DITO SIM Online via Official Link

This method is the most convenient because you can complete the process from anywhere with internet access. It works best for users who prefer a quick and paperless way of registering.

Steps to Register DITO SIM Online

DITO SIM registration online step 1

Step 1: Open your browser and type https://register.dito.ph/ using your phone or computer.

DITO SIM registration online Step 2

Step 2: Enter your DITO mobile number and request a One-Time Password (OTP).

DITO SIM registration online Step 3

Step 3: Type in the OTP you receive on your DITO SIM.

Step 4: Fill in your personal details such as full name, birthday, address, and nationality.

DITO SIM registration online Step 5

Step 5: Upload a valid government-issued ID and a clear selfie.

DITO SIM registration online Step 6

Step 6: Review your details and click submit.

DITO SIM registration online Step 7

Step 7: A confirmation message will be sent once your registration is successful.

How to Register Your DITO SIM via DITO App

The DITO app is a simple option for subscribers who already use the app to manage their account. It allows you to register your SIM directly on your mobile device without visiting a website.

Step-by-Step Guide to Register via DITO App

DITO SIM registration via DITO app step 1

Step 1: Download and install the DITO App from Google Play or the App Store.

DITO SIM registration via DITO app Step 2

Step 2: Open the app and log in using your DITO mobile number.

DITO SIM registration via DITO app Step 3

Step 3: Tap the “Register your SIM” banner when it appears on the home screen.

DITO SIM registration via DITO app Step 4

Step 4: Choose the appropriate type of registrant. For example, Filipino, foreign national, or minor.

DITO SIM registration via DITO app Step 5

Step 5: Enter your DITO mobile number and tap to request an OTP (One-Time Password).

DITO SIM registration via DITO app Step 6

Step 6: Input the OTP you receive via SMS on your DITO number.

DITO SIM registration via DITO app Step 7

Step 7: Upload a photo of your valid government-issued ID.

DITO SIM registration via DITO app Step 8

Step 8: Upload a selfie holding the same ID for verification.

DITO SIM registration via DITO app Step 9

Step 9: Fill in your personal information: full name, date of birth, gender, and address.

DITO SIM registration via DITO app step 10

Step 10: Review your information carefully, agree to the terms, and submit the form.

DITO SIM registration via DITO app step 11

Step 11: You should receive a confirmation of successful registration within the app or via SMS.

How to Register Your DITO SIM via SMS (if officially supported)

You can register your DITO SIM through SMS only if DITO officially supports this option in your area. This method can be the fastest route if the SMS link is enabled for your device.

Steps to register via SMS:

  1. Insert your DITO SIM into your phone.
  2. You will receive a text message from DITO with a registration link.
  3. Open the link from the SMS to access the registration form in your browser.
  4. Fill in the form with your personal details, upload a valid ID, and take or upload a selfie.
  5. Enter the One-Time Password (OTP) sent to your DITO number to verify.
  6. Review your information carefully and then tap submit.
  7. Wait for a confirmation SMS to confirm your registration is successful.

Note: This SMS option is only available if DITO officially enables it in your area.

How to Register Your DITO SIM via SMS

How to Register Your DITO SIM via DITO Stores

You can visit a DITO Experience Store or an authorized partner outlet to register your SIM in person with the help of staff. This option works well if you prefer face-to-face assistance or don’t have access to the app or internet.

How to Register Your DITO SIM via DITO Stores

Steps for in-person registration:

  1. Go to your nearest DITO Experience Store or an authorized partner outlet
  2. Bring a valid government-issued ID and your DITO SIM card
  3. Ask a store representative for help with SIM registration
  4. Provide your personal details and have your ID verified by the staff
  5. The representative will enter your information and take your photo if needed
  6. After form completion, the system will process your registration
  7. You will receive a confirmation message once your SIM is successfully registered

DITO SIM Registration for Foreigners, Tourists, and Minors

The SIM Registration Act applies not only to Filipino citizens but also to foreign nationals, tourists, and minors. Each group has specific rules and requirements to ensure their SIM cards are properly linked to a verified identity.

Registration for Foreign Nationals (Long-Term Stay)

Foreigners staying in the Philippines for work, study, or residency must register their DITO SIM to continue using mobile services. This ensures compliance with the SIM Registration Act and helps verify their legal stay.

Required Documents

Valid Passport (bio page)

Alien Certificate of Registration (ACR I-Card)

Valid visa (work, study, or residency)

Philippine address proof (utility bill, lease contract, or barangay certificate)

Step-by-Step Registration Process for Foreign Nationals

  • Step 1: Insert your new or existing DITO SIM into your mobile phone.
  • Step 2: Open a browser and go to https://register.dito.ph or open the DITO App.
  • Step 3: Enter your DITO SIM number and request the OTP (One-Time Password).
  • Step 4: Fill in your personal details such as full name, nationality, date of birth, and current Philippine address.
  • Step 5: Upload a clear photo of your passport and other required documents (ACR I-Card, employment/student ID, proof of residence).
  • Step 6: Review all details and submit the registration form.
  • Step 7: Wait for a confirmation SMS that your registration is successful.

Registration for Foreign Tourists (Short-Term Stay)

Foreign tourists visiting the Philippines can also register a DITO SIM, but their registration is valid only for a limited period. This helps travelers stay connected during their visit.

Required Documents

Valid Passport

Return ticket (departure date)

Temporary visa or entry stamp

Local address proof (hotel booking or host’s address)

Step-by-Step Registration Process for Foreign Tourists

  • Step 1: Buy a DITO SIM at the airport counter, DITO store, or authorized outlet.
  • Step 2: Insert the SIM into your phone and wait for the registration prompt.
  • Step 3: Provide your passport details and return ticket information.
  • Step 4: If registering at a store, the staff will help input your details into the system.
  • Step 5: SIM will be activated and valid for 30 days only.
  • Step 6: To extend, visit a DITO store or use the app with your updated visa or travel extension documents.

Registration for Minors (Below 18 Years Old)

Minors cannot register a SIM card under their own name because they are underage. To protect young users and ensure accountability, the SIM card must be registered by a parent or legal guardian. This process makes sure that the guardian is responsible for all activities and usage linked to the SIM, helping prevent misuse and keeping communication secure for the child.

Required Documents

Minor’s Birth Certificate

Parent or guardian’s valid government-issued ID

Guardian’s consent if required

Step-by-Step Registration Process for Minors

  • Step 1: A parent or legal guardian must initiate the SIM registration.
  • Step 2: Insert the SIM and open the DITO App or website.
  • Step 3: Enter the SIM number and request OTP.
  • Fill out the guardian’s personal details (full name, birth date, address).
  • Step 4: Upload the guardian’s valid ID and the minor’s birth certificate.
  • Step 5: Confirm and submit the registration form.
  • Step 6: Wait for a text message confirming successful registration.

Special Cases in DITO SIM Registration

Some situations fall outside the regular registration process, such as when you have multiple SIM cards, lose your card, or want to switch from another provider to DITO. In these cases, additional steps are provided to make sure your mobile number remains secure and usable.

By following the proper procedure, you can continue using your SIM without interruption while complying with the requirements of the SIM Registration Act.

Registering Multiple SIM Cards

Many people in the Philippines use more than one SIM card for work, personal use, or business. Under the SIM Registration Act, each of these SIMs must be registered separately to remain active.

Registering only one SIM does not automatically cover your other numbers. This means you need to repeat the registration process for every DITO SIM you own, even if they all belong to you.

Steps to Register Multiple SIM:

  • Insert your first DITO SIM card into a phone.
  • Open the DITO App or visit the official registration link and fill in your personal details.
  • Upload a valid government-issued ID and confirm the registration.
  • Once you receive a confirmation SMS, remove the first SIM and insert the second SIM.
  • Repeat the same process for each additional SIM.
  • Use the same personal details and valid ID for all your SIMs.
  • Keep each confirmation SMS as proof that all your SIM cards are registered.

Lost or Stolen DITO SIM Cards

If your DITO SIM card is lost or stolen, it can put your number at risk of being misused by someone else. To protect your identity and mobile services, you must immediately request a replacement.

DITO has made it simple to secure your account by visiting one of their stores. Once your details are verified, your old SIM will be blocked to prevent unauthorized use, and a new card will be activated under your name.

Steps to Replace a Lost or Stolen SIM:

  • Call the DITO customer service hotline or use the DITO App to report the lost SIM.
  • Request the customer support team to deactivate your old SIM to avoid fraudulent use.
  • Visit the nearest DITO Experience Store or partner outlet with a valid government-issued ID.
  • Ask for a SIM replacement and provide your registered mobile number.
  • Once you receive the replacement SIM, insert it into your phone.
  • Complete the SIM registration again using the same ID and personal details.
  • You will get a confirmation SMS once the replacement SIM is successfully registered and activated.

Switching from Other Networks to DITO (MNP)

Mobile Number Portability (MNP) lets you switch to DITO while keeping your current number. This is useful for those who want to enjoy DITO’s services without changing their long-used mobile number.

The process requires a special code from your old provider and a few verification steps with DITO. Once completed, your number will be transferred to the DITO network and fully registered under your identity.

Steps to Switch from Another Network to DITO:

  • Contact your current mobile provider and request a Unique Subscriber Code (USC). This code is required to transfer your number.
  • Prepare a valid government-issued ID and your USC.
  • Visit a DITO Experience Store or authorized outlet and tell the staff you want to switch using MNP.
  • Submit your ID and USC, then fill out the MNP application form provided by DITO.
  • The staff will give you a new DITO SIM that is linked to your old mobile number.
  • Insert the new SIM into your phone and wait for the activation process to complete.
  • Once you get a confirmation SMS, your old number will start working on the DITO network.

Registration Deadlines and Penalties

The government of the Philippines has set official deadlines for all SIM registrations, including DITO users. This ensures that every SIM card in use is properly documented and linked to a verified identity.

Both new and existing subscribers are required to complete registration before the final cutoff date announced by the Department of Information and Communications Technology (DICT).

Government Deadlines

All new DITO SIM cards must be registered before activation, meaning you cannot use the SIM until you complete the process.

For existing users, the DICT sets a nationwide deadline by which all unregistered SIM cards must be registered. If you fail to register before this date, your SIM will be deactivated automatically.

What Happens if You Miss the Deadline

If you do not register your DITO SIM within the given timeframe, it will be deactivated. This means you will lose access to calls, texts, mobile data, and even your number.

Once deactivated, you cannot use the SIM for any transactions or communication. Your mobile number will no longer be available unless you follow the reactivation steps.

How to Reactivate a Blocked SIM

If your SIM card gets deactivated due to missed registration, you may still have a chance to recover it. DITO usually provides a grace period during which you can register and request reactivation.

To do this, insert your deactivated SIM, attempt to use it, and follow the instructions sent via SMS or provided on the DITO official website. You will be asked to complete the registration process with your valid ID and personal details. However, if you fail to register even during the grace period, your SIM and number may be permanently lost.

How to Check if Your DITO SIM is Already Registered

After completing the registration, it’s important to confirm if your DITO SIM is successfully linked to your identity. This ensures your number stays active and prevents service interruptions. DITO offers several ways to check your registration status.

Through the DITO App

  1. Download and open the DITO App on your phone.
  2. Log in using your DITO mobile number.
  3. Go to Account Settings.
  4. Select SIM Registration Status.
  5. If your SIM is registered, you will see a confirmation message.

Via Confirmation Text

  1. After registration, DITO sends a confirmation SMS.
  2. Open your messages inbox and look for the registration confirmation.
  3. If you cannot find the message, check the DITO App or contact customer service.

Customer Service Support

  1. Call the DITO hotline 185 to ask about your registration status.
  2. Use the live chat option inside the DITO App.
  3. Visit a DITO Experience Store for in-person checking.
  4. Customer service will confirm if your SIM is already registered in their system.

How to Update Your Registration Details

Sometimes you may need to update your DITO SIM registration if there are changes in your personal information, such as a new home address, an updated ID, or corrections in your details. Keeping your information accurate ensures that your SIM remains valid and compliant with government requirements.

Information You Can Update

  • Change of residential address
  • Update of valid ID (newly issued or replacement)
  • Correction of personal details (such as name, date of birth, etc.)

Process Through the DITO App

  • Open the DITO app on your phone.
  • Log in with your DITO number and OTP (One-Time Password).
  • Go to Account/Profile Settings.
  • Select Update SIM Registration Details.
  • Enter the updated information (new address, ID number, or personal details).
  • Upload a clear photo of your valid government ID.
  • Review the information and confirm the update.
  • Wait for a confirmation message that your registration details have been updated.

What Happens if You Fail to Register?

If you fail to register your DITO SIM within the government-mandated deadline, your SIM card will be automatically deactivated. Once deactivated, there is also a high chance that you will permanently lose your mobile number, making it impossible to recover.

In some cases, DITO may provide a short grace period during which you can still register and reactivate your SIM. However, if that grace period passes, the only option is to purchase a new SIM card and complete the registration process again.

To avoid losing access to your services, it is important to complete your SIM registration on time.

DITO Registration Rewards

Registering your DITO SIM not only keeps your number active and secure but also comes with exciting perks. DITO offers various rewards such as free data, calls, and texts, along with exclusive promos that are only available to registered users. These bonuses give subscribers extra value and can be easily claimed through the DITO app.

Freebies After Registration

  • Get free mobile data after successful registration
  • Enjoy complimentary call minutes
  • Receive bonus text credits instantly

Exclusive Promos for Registered Users

  • Access special discounted data promos
  • Get bonus load offers only for registered SIMs
  • Unlock app-exclusive deals and perks

How to Claim Rewards via DITO App

  • Open the DITO app on your phone
  • Log in with your registered mobile number
  • Go to the Rewards or Promo section
  • Select the available offer and claim it
  • Rewards will be automatically added to your account

DITO SIM Benefits

Using a DITO SIM comes with many advantages that make mobile communication more affordable and reliable. From cost-friendly promos to advanced technology, DITO ensures users enjoy a smooth and rewarding mobile experience.

Affordable Data Packages

DITO is known for its low-cost data promos that fit different budgets and lifestyles. You can choose from daily, weekly, or monthly data packages that allow you to browse, stream, and stay connected without spending too much. These promos are flexible, making them ideal for students, professionals, and families who need constant internet access.

High-Speed 4G/5G Internet

The DITO network is built with modern technology, allowing users to enjoy high-speed 4G and 5G connectivity. This means faster downloads, smooth HD video streaming, and a better experience when using social media apps or playing online games. With 5G expansion, more users can experience lightning-fast internet speeds.

Clear Voice Calls (VoLTE)

DITO SIMs support VoLTE (Voice over LTE), a feature that makes voice calls clearer and more reliable. Calls connect faster and have higher sound quality compared to traditional networks. This is especially useful for users who rely on stable communication for work, school, or personal matters.

Expanding Nationwide Coverage

DITO is continuously growing its coverage across the Philippines. Every year, more towns and cities are being added to its network, improving signal strength and reliability. This expansion ensures that more Filipinos can access affordable mobile services and enjoy fast internet wherever they go.

Extra Perks for Registered Users

Subscribers who complete their SIM registration enjoy additional benefits like free data, bonus call minutes, and access to exclusive promos. These perks give users more value while also ensuring that their number remains active, secure, and compliant with government rules.

Comparison with Other Providers

When comparing SIM providers in the Philippines, looking at data packages, internet speed, coverage, and registration requirements helps you make a clear choice. Below is a table showing how DITO, Globe, Smart, and TNT stack up against each other.

Feature

DITO

Globe

Smart

TNT (Talk ‘N Text)

SIM Type

Prepaid, Postpaid, 5G, Tourist

Prepaid, Postpaid, 5G

Prepaid, Postpaid, 5G

Prepaid only

Data Packages

Affordable, high data allocation

Flexible but often higher priced

Wide range, moderate pricing

Budget-friendly, smaller data

Internet Speed

High-speed 4G/5G (up to 1Gbps)

Strong 4G/5G in urban areas

Reliable 4G/5G nationwide

Basic 4G/LTE, slower than Smart

Coverage

Expanding, strong in cities

Nationwide, strongest in rural

Nationwide, strong in both urban and rural

Nationwide, rides on Smart’s network

Voice Calls (VoLTE)

Supported, clear calls

Supported

Supported

Supported via Smart network

Registration

Mandatory under SIM Law

Mandatory under SIM Law

Mandatory under SIM Law

Mandatory under SIM Law

Best For

Affordable internet, 5G users

Premium users, wide coverage

Balanced users, reliable network

Budget-conscious users, call & text

Data Privacy and Security in DITO SIM Registration

When you register your DITO SIM, your personal information is protected under the Data Privacy Act of 2012. This law ensures that telecom providers like DITO are legally bound to handle your data with care, store it securely, and prevent unauthorized access.

DITO uses advanced security systems to safeguard your information. All uploaded IDs and personal details are encrypted and stored in a secure database, reducing the risk of leaks or hacking. Only authorized personnel are allowed to process and verify your details.

Users are also assured that their information will not be misused. DITO cannot share or sell your data to third parties without your consent, and the information is used strictly for SIM registration and legal compliance. This gives subscribers confidence that their identity and mobile number remain safe while enjoying uninterrupted services.

Common Issues During Registration and Solutions

Registering your DITO SIM can sometimes come with difficulties. Below are the most common issues that users face, along with step-by-step solutions to help you fix them.

1. Invalid or Rejected ID

Sometimes, the system may reject your ID if it’s not recognized or if the photo is unclear.

Solution:

  • Check if your ID is included in the official list of valid government IDs.
  • Make sure the ID is not expired.
  • Take a clear photo of the ID without glare or blur.
  • If still rejected, try submitting another valid ID.

2. Poor or Unclear Selfie Upload

Many users face issues with their selfie being rejected because of low light, blurred images, or covered faces. This prevents the system from verifying your identity.

Solution:

  • Stand in a well-lit place with natural or bright light.
  • Remove masks, hats, or sunglasses before taking the photo.
  • Hold the phone steady and avoid using filters.
  • Retake the selfie if the system rejects it.

3. Errors in Personal Information

If the information you type does not match what appears on your ID, the registration may not go through. Even small spelling mistakes can cause issues.

Solution:

  • Re-check your name, birthday, and ID number before submitting.
  • Make sure the details exactly match your ID.
  • Correct any mistakes and re-submit the form.

4. Weak or No Internet Connection

A slow or unstable internet connection often causes the registration to fail or freeze midway. This can be frustrating for users in low-signal areas.

Solution:

  • Switch to a stronger Wi-Fi or mobile data connection.
  • Avoid registering in areas with poor signal.
  • Restart your device if the problem continues.

5. No Confirmation Message Received

After completing registration, some users don’t receive the confirmation SMS right away. This can make them unsure if the process was successful.

Solution:

  • Wait for a few hours as the process may take time.
  • Check your DITO app notifications.
  • Restart your phone to refresh the SIM network.
  • If still no message, contact DITO customer support.

6. SIM Already Registered

In some cases, the system may show that your SIM is already registered. This can happen if you bought a pre-registered SIM or if there was an error in the database.

Solution:

  • Open the DITO app and check if your SIM is already registered.
  • If you bought a pre-registered SIM, ask the seller for details.
  • If the SIM is incorrectly registered, contact customer service for reactivation or correction.

Frequently Asked Questions (FAQs) about DITO SIM Registration

How do I register my DITO SIM number?

You can register through the official website, the DITO app, via SMS (if supported), or by visiting a DITO store. After completing the process, you’ll receive a confirmation text.

How do I know if my DITO SIM is already registered?

You will receive a confirmation text after successful registration. You can also check your status through the DITO app or by contacting customer service.

Why won’t my SIM register in my phone?

This can happen if the SIM is not inserted properly, your phone is locked to another network, or there’s weak signal in your area. Make sure your SIM is correctly placed, your phone is unlocked, and try restarting your device. If the issue continues, contact DITO support for help.

Can I register more than one DITO SIM under my name?

Yes. You can register multiple SIM cards, but each SIM must be registered individually using your valid ID and personal information.

What if I lose my registered DITO SIM?

Report it immediately to DITO customer service. You will need to present your valid ID to request a SIM replacement and keep your number.