The current MTN USSD code to check your phone upgrade eligibility or access account services is *123#; this menu provides access to several service options, including possible upgrade information depending on your SIM status[2].
For general MTN balance checks and related services, here is a quick overview of essential USSD codes in Nigeria:
- Check airtime balance: *310#[1]
- Check data balance: *323# (or specifically *323*4# for direct data balance)[3][4][7]
- Buy data: *312#[2][4]
- Recharge airtime: 311*Voucher PIN#[1][6]
- SIM/NIN linking: *996#[2][4]
- Know your MTN number: *123# (navigate to Account Info, then My Number)[1][2][5]
Note: MTN does not have a single dedicated “upgrade check” code (such as for checking SIM upgrade eligibility) as of 2025, but all SIM and eligibility options are available within the *123# service menu[1][2][4].
References
- [1] Updated MTN USSD Codes 2025
- [2] Updated List of New USSD Codes for Mobile Operators in Nigeria
- [3] How To Check MTN Data Balance in Nigeria
- [4] MTN Nigeria USSD Codes 2025: Check Balance, Buy Data
- [5] Here is a list of all the new USSD codes for MTN, Airtel and …
- [6] Popular USSD Codes in Nigeria in 2024
- [7] How to Check Airtime And Data Balance On MTN, Airtel …