7 Hidden MTN USSD Codes Every Nigerian Should Know in 2025

MTN is one of Nigeria’s leading network providers, offering a variety of services. But beyond the popular shortcodes we all know, there are several hidden or lesser-known MTN USSD codes that most people aren’t using — even though they’re incredibly useful.

In this post, we’ll show you 7 secret MTN USSD codes that can help you unlock bonus data, access exclusive services, and manage your line more smartly in 2025.

1. Check for Special Data Offers – *121#

This code is your gateway to MTN personalized offers. It checks your SIM profile and gives you discounted data bundles, bonus offers, and airtime deals you won’t find in regular plans.

How to use:

• Dial *121# and select from the available offers (e.g. 1.5GB for N300, 2GB for N500, etc.)Tip: Offers change frequently, so check often to grab the best deals.

2. Check All Active Subscriptions – *305#

Want to see all the services and content you’re subscribed to? Use this code to avoid being charged for services you didn’t authorize or forgot to cancel.

How to use:

• Dial *305# and follow the prompt to see your active subscriptions.
• You can also unsubscribe from unwanted services here.

3. Check Data Plan & Bonuses at Once – *323#

While *131*4# is common, this new USSD code is more updated and detailed. It shows your main data balance, bonus balance, and validity.

How to use:

• Dial *323# to view your full data balance breakdown.

4. Stop All Value-Added Services (VAS) – *305*0#

Ever noticed small amounts disappearing from your airtime? You’re likely subscribed to value-added services you didn’t ask for. This code unsubscribes you from ALL of them at once.

How to use:

• Dial *305*0# and confirm.Saves you from silent airtime deductions.

5. Check Your NIN Linking Status – *785#

In 2025, SIMs without NIN linkage risk being barred. Use this code to check your National Identity Number (NIN) status on your line or link it if you haven’t already.

How to use:

• Dial *785# and follow the prompt.

6. Borrow Airtime or Data – *303#

If you’re low on airtime or data, this shortcode allows you to borrow and pay back later. You can borrow airtime, data, or even combo bundles.

How to use:

• Dial *303#, select the option you need, and you’ll receive it instantly (with a service fee).

7. Retrieve Your MTN Number – *663#

Forgot your own number? No need to panic.

How to use:

• Simply dial *663#.
• Your 11-digit MTN number will be displayed on-screen and sent to you via SMS.

Final Thoughts

Many MTN users only use a few popular codes and miss out on features that could save them money or improve their user experience. These hidden MTN codes are safe, official, and updated to work in 2025.

Bookmark this post or share it with someone who might find it helpful — especially those who complain about airtime deductions or want better data deals.

For more telecom tips, visit Updatemii.com.ng — your trusted source for MTN, Airtel, Glo, and 9mobile guides.