How to Check Data Balance on MTN, Airtel, Glo and T2
One code works on every network now. Here is how to use it, plus the backup options when it doesn't respond.
Dial *323# on any Nigerian network (MTN, Airtel, Glo or T2, formerly 9mobile) to see your data balance and expiry date. It is the official NCC code for data balance on every network since 2023, and it is free. If it fails, use your network's app or the menu under *312#.
The data balance code for every network
The Nigerian Communications Commission (NCC) made all networks use the same short codes in 2023, so you no longer need a different code for each SIM.
| Network | Data balance | Airtime balance |
|---|---|---|
| MTN | *323# | *310# |
| Airtel | *323# | *310# |
| Glo | *323# | *310# |
| T2 (formerly 9mobile) | *323# | *310# |
Dial the code, wait a few seconds, and a pop-up or SMS shows how much data you have left and when it expires. Checking is free.
Tip: if you have more than one SIM, dial from the SIM you want to check. On dual-SIM phones, the phone may ask you to pick one.
How to read the result
The message usually shows:
- Main data: the data from the plan you bought, in MB or GB (1GB = 1,024MB).
- Bonus or night data: extra data you can only use at certain times (often midnight to 5am) or on certain apps.
- Expiry date: the day the data stops working. Unused data is lost after this date unless you renew before it expires and your plan rolls over.
If you bought several plans, some networks show each one separately. Add them up to get your total.
Other ways to check your data balance
Use the network's app
- MTN: MyMTN app
- Airtel: myAirtel app
- Glo: Glo Café app
- T2: the T2 self-care app or website
The apps show every bundle, its expiry date and your usage history. They need some data or Wi-Fi to open.
Use the data menu
Dial *312# (the general data menu on all networks) and look for "Check balance" or "My account". This is useful when *323# is busy.
Older network codes
Some older codes may still work on some lines, such as MTN *131*4#, Airtel *140#, Glo *127*0# and 9mobile *228#. Networks can switch these off at any time, so start with *323#.
What to do if *323# doesn't work
- Check your signal. USSD codes need network coverage, not data. Move to a spot with better signal and try again.
- Wait and retry. "Connection problem or invalid MMI code" usually means the network is busy. Try again after a minute.
- Turn on airplane mode for 10 seconds, then turn it off. This reconnects your SIM.
- Check that the SIM is active and linked to your NIN. A SIM barred over NIN-SIM linkage can't use most codes. Dial
*996#to check your NIN-SIM status. - Use the app or
*312#as a backup. - Call customer care on 300 if your balance looks wrong after you just bought data.
Why your data finishes faster than expected
If the balance drops quickly, these are the usual causes:
- Background apps: app updates, cloud photo backup (Google Photos, iCloud) and auto-playing videos use data even when you are not on your phone. Set updates and backups to Wi-Fi only.
- Video quality: one hour of HD video on YouTube or TikTok can use 1GB or more. Lower the video quality in each app's settings.
- Hotspot: other devices connected to your hotspot share your data.
- Bonus data rules: night or social bonus data does not cover other use, so your main data pays for it.
On Android, go to Settings → Network → Data usage to see which app uses the most. On iPhone, go to Settings → Mobile Data.
How to stop data from running out at a bad time
Check your balance before a long download or a video call, and keep a little airtime as a fallback. When you need more, buy a plan rather than browsing on airtime, because browsing without a plan costs far more per MB.
You can buy MTN, Airtel, Glo and T2 data on Gsubz for less than most direct prices. It arrives in seconds, 24/7. You can also buy airtime at a discount, or turn your own airtime and data sales into a business with the Gsubz API.
Check data balance for someone else
You can't check another person's data balance with a code from your phone. The person has to dial *323# on their own line or check their app. If you are buying data for family, ask them to confirm their balance after you send it.
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Open Gsubz →Frequently asked questions
What is the code to check data balance on all networks in Nigeria?
Dial *323#. It works on MTN, Airtel, Glo and T2 (formerly 9mobile) and is the official NCC data balance code.
Is checking data balance free?
Yes. Dialling *323# or *310# to check your balance is free on all networks.
Why is *323# not working on my phone?
Usually the network is busy or your signal is weak. Retry after a minute, restart airplane mode, or use your network's app or the *312# menu. If your SIM is not linked to your NIN, most codes won't work until you link it.
How do I check data balance on T2 (formerly 9mobile)?
Dial *323#, the same code as the other networks. You can also use the T2 self-care app.
Does unused data roll over?
It depends on the plan. Many plans roll over unused data only if you renew before the expiry date. Check the terms of your plan.
What is the code to check airtime balance?
Dial *310# on any network.
How we check this guide
The Gsubz team checked these facts on 9 Nov 2026, using official sources first (NCC, NERC, the networks, DisCos and exam bodies), then our own transaction records. Prices and codes change, so we update this page when they do.
Sources: NCC: harmonised short codes for all service providers · The Guardian: 9mobile rebrands to T2