Please note
Belmadeng is an independent guide and is not affiliated with, endorsed by or sponsored by MTN, Airtel, Glo, 9mobile or any network. Data prices and bundles change constantly — every price here is indicative only. Always confirm the current plan by dialling the official code (the unified *312#) or using the network’s own app before buying. USSD codes can also change — verify on the network’s official channel.
The universal code
On all networks, dial *323# to check your data balance (and usually the expiry date). It's the simplest, no-internet way — memorise it.
MTN
*323#, or text 2 to 131, or the MyMTN app (also shows *559# for account info on some lines). See MTN data.
Airtel
*323#, or the Airtel/MyAirtel app. See Airtel data.
Glo
*323#, or text INFO to 127, or the Glo Café/MyGlo app. See Glo data.
9mobile
*323#, or the My9mobile app.
Reading expiry
Your balance check usually shows remaining data and an expiry date. Data expires whether or not you've used it, so note the date — and if you're near expiry with data left, plan your usage or top up strategically.
Tips
- *323# works everywhere.
- Note the expiry date, not just the balance.
- Apps show bonus/night data separately.
Balance-check codes by network
Knowing your remaining data prevents nasty surprises. The quick USSD checks:
- MTN: *131*4# (or the myMTN app)
- Airtel: *140# (or the Airtel Thanks app)
- Glo: *127*0# / *323# (or the Glo Café app)
- 9mobile / T2mobile: *228#
Each returns your remaining data and often the expiry date by SMS or on-screen. The network apps show the same information, usually with a clearer usage breakdown.
Track usage before it runs out
Checking your balance is reactive; tracking usage is proactive. The network apps and your phone's built-in data-usage monitor show which apps consume the most, so you can rein in the heavy ones before they drain your bundle. Many networks also send alerts at 75% and 100% of a bundle. Glancing at your balance before a big download or video session — not after — is the habit that keeps you from being caught out mid-task.
Why expiry matters
Data doesn't only run out by use — it also expires. Most plans have a validity window (daily, weekly, monthly), after which unused data is lost unless the plan supports rollover and you renew in time. So when you check your balance, note the expiry date too: if you've plenty of data but it's about to expire, plan to use or renew it. Matching your plan choice to how fast you actually use data avoids paying for gigabytes that expire unused.
Frequently asked questions
How do I check my data balance in Nigeria?
On all networks dial *323# — it shows your data balance and usually the expiry date; each network also has SMS and app options.
How do I check MTN data balance?
Dial *323#, text 2 to 131, or use the MyMTN app.
How do I check Glo data balance?
Dial *323#, text INFO to 127, or use the Glo Café/MyGlo app.
How do I check Airtel or 9mobile data balance?
Dial *323# on either — or use the Airtel/MyAirtel app, or the My9mobile app.
Does my data expire even if unused?
Yes — bundles expire on their validity date whether or not you've used them, so note the expiry when you check your balance and plan usage or top-ups accordingly.
How do I check my data balance in Nigeria?
By USSD: MTN *131*4#, Airtel *140#, Glo *127*0# (or *323#), 9mobile/T2mobile *228#. Each returns your remaining data and often the expiry date. The network apps show the same with a clearer usage breakdown.
What is the MTN data balance code?
Dial *131*4#, or check the myMTN app. It shows your remaining data and expiry.
What is the Airtel data balance code?
Dial *140# for a free SMS, or use the Airtel Thanks app, which shows usage most accurately.
How do I track which apps use my data?
Use the network app or your phone's built-in data-usage monitor, which show consumption per app so you can rein in the heavy ones. Many networks also alert you at 75% and 100% of a bundle.
Does data expire even if I don't use it?
Yes — most plans have a validity window, after which unused data is lost unless the plan supports rollover and you renew in time. Check the expiry when you check your balance, and use or renew data before it lapses.