MTN, Airtel, Glo & 9mobile USSD Codes

If you are tired of memorizing different USSD codes for MTN, Airtel, Glo, and 9mobile, you are not alone.

With the recent Nigerian Communications Commission (NCC) harmonization, many of the old codes you used to know have completely changed, leaving millions of subscribers confused with “Invalid MMI” errors.

Whether you need to check your data balance, transfer airtime to a friend, link your NIN to avoid line disconnection, or activate a midnight browsing plan, Scholar Joiner has you covered.

We built the Master USSD Code Finder below to give you the exact, working 2026 codes for every network in Nigeria instantly.

Simply select your network and what you want to do, and copy the code!

Understanding the 2026 NCC Harmonized USSD Codes

To make mobile telecom services easier for Nigerians, the NCC directed all telecommunication providers (MTN, Airtel, Glo, and 9mobile) to unify their most common USSD codes.

This means you no longer have to remember four different codes just to check your airtime balance.

Here are the universal codes that now work across all networks in Nigeria:

• Check Airtime Balance: Dial *310# on any network.
• Check Data Balance: Dial *323# on any network.
• Share Airtime: Dial *321# on any network.
• Link NIN: Dial *996# on any network.
• Call Customer Care: Dial 300 on any network.

Network-Specific Codes (MTN, Airtel, Glo, 9mobile)

While the basic services have been harmonized, specific features like Night Plans, borrowing credit, and checking your phone number still require unique network codes.

🟡 MTN Codes

MTN Nigeria is the largest telecom network in the country. If you have forgotten your phone number, you can quickly check it by dialing *123*1*1#. For students and heavy downloaders, the MTN Pulse Night Plan remains one of the most popular packages, which can be activated using *406#.

🔴 Airtel Codes

Airtel users frequently search for how to check their own number because the old *282# code often fails on newer SIM cards. The most reliable way to check your Airtel number today is by dialing *121*3*4#. To buy Airtel everyday data or night plans, the unified *312# menu is your best route.

🟢 Glo & 9mobile Codes

Glo (Grandmasters of Data) and 9mobile offer some of the cheapest data plans in Nigeria. Glo users can find their phone number by dialing *135*8#, while 9mobile users can simply dial *248#. If you ever over-recharge your bank account by mistake, you can also use third-party fintech apps to convert your Glo or 9mobile airtime back to cash.

Frequently Asked Questions (FAQs)

Why are my old USSD codes saying “invalid”?

Because the NCC forced all telecom operators to harmonize their codes, legacy codes (like *556# for MTN airtime or *127# for Glo data) have been phased out. You must use the new updated codes provided in our tool above.

How can I convert airtime to cash?

If you mistakenly bought too much airtime from your bank app, you cannot reverse it directly through your network provider. You will need to use verified third-party FinTech applications like Palmpay, Tingtel, or Aimtoget to sell the airtime for cash.

How do I check my data balance quickly?

Instead of navigating through long menus, you can use direct extension codes. For example, dialing *323*1# on Airtel or *323*0# on Glo will show your data balance directly on the screen.