How to Upgrade Smart SIM to 5G with Same Number

If your phone struggles to connect to the internet or only shows a 3G signal when others around you enjoy fast LTE or 5G, the issue might not be your device but your SIM card. An outdated Smart SIM can limit your speed, weaken your signal, and even block you from joining the latest promos.

The good news is that upgrading your Smart SIM is quick and easy. You can keep the same number you’ve had for years so you won’t lose contacts or registered services, or you can start fresh with a new number if that suits you better. If you haven’t registered your SIM yet, check our detailed guide on Smart SIM Registration before upgrading.

In this guide, you’ll find everything you need to know: when to upgrade, what you’ll need before starting, how to do it yourself or with help from a Smart Store, and what to expect after the process.

What Does Upgrading a Smart SIM Mean?

Upgrading a Smart SIM means replacing your old SIM card with a new one that supports LTE or 5G. This allows your phone to connect to faster networks, giving you smoother browsing, stronger signal, and better call quality.

When you upgrade, you have two options. You can keep the same number you already use, which means your contacts, load, and active promos stay the same. Or, if you prefer a fresh start, you can get a new SIM with a different number.

Both options give you access to Smart’s faster network, so the choice depends on whether you want to keep your current number or not.

Signs You Need to Upgrade Your Smart SIM

Not every SIM needs replacing right away, but there are clear signs that tell you it’s time to upgrade:

If you notice one or more of these, upgrading your Smart SIM is the simplest way to fix the problem and unlock better performance.

What You Need Before Upgrading

Before you start the upgrade process, make sure you have the following ready. Having these on hand will save you time and prevent delays:

Having these items prepared makes the upgrade smoother, whether you choose to do it yourself or get help from a Smart Store.

How to Upgrade Your Smart SIM

There are two main ways to upgrade your Smart SIM: you can do it yourself using a SIM upgrade kit, or you can visit a Smart Store and have it processed for you. Both methods are simple, and you can choose the one that fits your situation best.

Method 1: Upgrade With the Same Number (Self-Service)

This is the most common choice because it lets you keep your current number, load, and promos.

1. Buy a Smart LTE/5G SIM upgrade kit. These are available in Smart Stores and partner retailers.
2. Turn off your phone and remove your old SIM card.
3. Insert the new SIM into your phone.
4. Text UPGRADE <space> your 11-digit mobile number to 9999 using the new SIM. Example: UPGRADE 09123456789.
5. Wait for confirmation. You’ll receive a message that your old number has been successfully transferred.
6. Restart your phone. Once your phone is back on, check your signal. Your number, load, and active promos should already be working on the new SIM.

Method 2: Get a New SIM With a Different Number

If you’d rather start fresh, you can get a new SIM with a new number. This is often chosen when:

• You want a new mobile number.
• Your old SIM is damaged or missing.
• You no longer need the contacts or load tied to your old number.

Steps:

1. Buy a new Smart LTE/5G-ready SIM.
2. Insert it into your phone.
3. Activate it by connecting to the network. You should receive a welcome message from Smart.
4. Start using the SIM. Since this is a new number, you’ll need to reload and re-register for promos.

Method 3: Upgrade at a Smart Store

If you prefer in-person help or face issues with the self-service option, visiting a Smart Store is the best choice.

1. Bring your old SIM, your phone, and a valid ID.
2. Tell the staff you want to upgrade your SIM. They’ll check if your number is eligible for LTE or 5G upgrade.
3. Choose whether to keep your number or get a new one. Most users choose to keep their number.
4. Wait while the staff processes the upgrade. They’ll transfer your number and services to the new SIM.
5. Test the SIM before leaving. Make a quick call or check your data connection to confirm it’s working.

Upgrading through a Smart Store is helpful if your SIM is damaged, you encounter errors while trying to upgrade via text, or you need guidance on choosing the right SIM size (nano, micro, or standard).

What Happens After the Upgrade

Once you’ve upgraded your Smart SIM, the changes are almost immediate. Knowing what to expect helps you confirm that the upgrade worked and prevents confusion.

• Your number stays the same if you chose a same-number upgrade. You won’t lose your contacts, text messages, load, or active promos. Everything is carried over to your new SIM automatically.
• Your old number is deactivated. The older SIM will no longer work once the transfer is complete. This ensures that only your new SIM is active.
• Your new SIM connects to LTE or 5G networks. This means faster browsing, smoother video calls, and better overall signal quality.
• Service activation may take some time. In most cases, it works within minutes, but in some areas it may take a few hours before the new SIM fully activates.
• If you chose a new number, you’ll need to reload, register for promos again, and inform your contacts about the change.

After upgrading, always restart your phone and check your signal. If everything is working, you’re ready to enjoy better coverage and faster data speeds with your Smart LTE or 5G SIM.

Also Read: How to Borrow Load in Smart 

Troubleshooting Common Issues

Sometimes, after upgrading your Smart SIM, things may not work right away. Here are common problems and how to fix them:

Benefits of Upgrading to a Smart LTE/5G SIM

Upgrading to a Smart LTE or 5G SIM is not just about getting a new card. It gives you access to stronger signal, faster internet, and better overall mobile experience. Here’s what you gain once the upgrade is complete:

• Faster internet speeds: LTE and 5G SIMs can handle higher data speeds, which means quicker browsing, smoother video streaming, and less buffering during calls or meetings.
• Clearer voice calls: With features like VoLTE (Voice over LTE), calls connect faster and sound clearer compared to older SIMs.
• Better coverage: Newer SIMs are built to connect with Smart’s expanded LTE and 5G network, giving you stronger signal even in crowded areas.
• Access to new promos: Many of Smart’s latest data and call promos are designed for LTE and 5G users only, so an upgraded SIM lets you take advantage of more offers.
• Compatibility with new devices: Most modern smartphones are LTE or 5G-ready. Having the right SIM ensures your phone performs at its best.
• Future-ready connection: As older networks like 3G are phased out, upgrading ensures your SIM works with today’s and tomorrow’s network technology.

By upgrading, you’re not just keeping your number; you’re also making sure your SIM matches the speed and performance of your device and network.

Conclusion

Upgrading your Smart SIM is a simple step that makes a big difference in how you use your phone. Whether you keep your current number or choose a new one, the process is quick and ensures you get faster internet, clearer calls, and access to the latest Smart promos.

If your phone still runs on 3G or you notice weak signal and dropped calls, it’s time to upgrade. Prepare your valid ID, your current SIM, and a new LTE or 5G-ready SIM, then follow the steps or visit the nearest Smart Store for assistance.

Making the switch today keeps your number active, your promos intact, and your mobile experience ready for stronger and faster connections.

Frequently Asked Questions