A data-balance check helps you confirm what remains, when a bundle expires and whether a recent purchase has been credited. This guide explains how to use the Nigerian harmonised balance code on MTN, Airtel, Glo and 9mobile, select the correct SIM and read the reply without confusing airtime with data. It covers official app and self-care alternatives, delayed SMS replies,
Use the harmonised data-balance code for Nigerian mobile networks.
What to dial first
| Need | Code or route | Use it for |
|---|---|---|
| All networks | *323# | Check active data balance |
| Provider app | Official network app | See plan type and expiry |
| Customer care | 300 | Ask support about unclear balance |
Step-by-step
- Dial *323# from the SIM you want to check.
- Press call and wait for the response.
- Read the data categories and expiry dates.
- If you use dual SIM, confirm you checked the browsing SIM.
- Save the message if you are reporting a failed purchase.
Expected result
You should receive a USSD screen or SMS showing remaining data and sometimes plan expiry.
Alternatives
Use provider app or phone data settings for extra usage details.
Common errors and fixes
- No response: retry in stronger signal.
- Different balances: check bonus/night/social categories.
- Data missing after payment: report with purchase reference.
The NCC harmonised short code list identifies *323# for data balance.
Quick data-balance answer
To check data balance on Nigerian networks, use the official provider balance menu, provider app or self-care channel. The harmonised short code for data balance is commonly presented as *323#, but always confirm through your network menu because provider services can change.
Why checking balance matters
Data can finish quietly through app updates, video autoplay, hotspot sharing or background sync. A balance check helps you know whether you need to renew, reduce usage or switch to Wi-Fi before an important task.
For business owners, checking data balance is part of reliability. A POS agent, delivery rider or online seller may lose customers if data ends during payment or customer chat. The habit is small but useful.
Know what kind of data you have
Some data balances are split into main data, bonus data, night data, social data or rollover data. When you check balance, read the category and expiry date. A phone may show data remaining, but it may not work for every app if the plan is restricted.
If you use two SIMs, confirm which SIM is active for mobile data. Many people check balance on one SIM while browsing from another SIM, then get confused.
Ways to check your remaining data
Use the method that matches your device and connection.
- Use the official data-balance USSD menu.
- Open the provider app if you have internet access.
- Check SMS alerts sent after buying data.
- Review phone settings for data usage by app.
- If balance looks wrong, contact official customer care.
- Save screenshots only for your own records or official support.
If the balance disappears after a failed purchase, keep the purchase message and report to the provider.
Data-balance methods compared
| Method | Best use | What it shows | Limit |
|---|---|---|---|
| USSD | No internet access | Provider balance message | May time out |
| Provider app | Detailed account view | Plan type and expiry | Needs app/login |
| Phone settings | Usage by app | What consumed data | May not match provider billing exactly |
| Customer care | Disputes and unclear balances | Support explanation | May take time |
Three balance-check situations
The following examples explain three balance-check situations and show how the guidance applies in different situations.
1. Online class before exam
A student checks data before joining a class. The balance shows a night plan, so the student buys an all-day plan instead of missing the session.
2. POS agent during business hours
A POS agent checks data before opening for the day. This reduces the risk of payment delays when customers arrive.
3. Hotspot shared at home
A user shares hotspot and data finishes quickly. Phone settings can show which connected activity used the most data.
Privacy and support cautions
Data balance is not as sensitive as a bank balance, but your phone number and SIM profile are still personal. Do not send OTPs or NIN details to strangers who claim they can restore data.
Use official network provider channels and the NCC website for general telecom information.
Data balance FAQs
The following examples explain data balance FAQs and show how the guidance applies in different situations.
Why do I see different balances?
You may have main data, bonus data, social data or night data. Read the plan categories carefully.
Can phone settings replace provider balance?
No. Phone settings estimate usage on the device, while provider balance reflects the network account.
Why did data expire even though I did not use it?
Plans have validity periods. Unused data may expire depending on provider rules.
What if I was charged but data did not enter?
Save the purchase message and report through official provider support.
Check early, not after disconnection
A quick balance check before important work can prevent frustration. It also helps you understand which apps use the most data.
Use our Network Finder for common codes and leave a correction if a provider menu changes.
Verification record
- Last fact-check
- July 18, 2026
- Method
- Official provider or regulator sources reviewed where available; live menus control account-specific actions.
- Reviewed by
- Nigeria USSD Codes Editorial Team
Primary official sources:
Article note
Last reviewed: July 18, 2026. This independent guide is informational and does not replace instructions from your bank, telecom provider, regulator, or service provider. Verify sensitive actions through an official channel before sending money or sharing information.