The MTN USSD code for upgrading your SIM or services (such as migrating to a new tariff plan or accessing MTN’s main menu for further upgrades) is *123# for the general services menu, which you can use to navigate to various upgrade and migration options.[7]
If the upgrade you need is specifically for NIN linking or subscriber information updates, you can use 785# or 996#, depending on your region and preference.[1][2]
For tariff migration and plan upgrades, MTN now uses harmonised short codes. Dial *123# and follow the prompts to explore upgrades, or use the MyMTN App for detailed plan changes and upgrades.[7][2]
It’s important to note that as of 2023, the Nigerian Communications Commission (NCC) mandated uniform short USSD codes across networks, and some traditional codes have changed. Always use the latest codes provided by MTN or visit their website/app for updates.[4][2]