Among all the challenges experienced in the telecommunication industry including high tariffs, the Nigerian Communication Commission NCC could only consider unifying the USSD codes from different mobile networks to help with issues of users trying to memorize all the mobile network USSD codes and their functions.



So, if you are having issues with your usual USSD code and if your network provider hasn't addressed the new changes to you, make use of the codes;

Service | Unified USSD Codes
Call Centers 300
Borrow Services *303#
Stop Service *305#
Check Balance *310#
Credit Recharge *311#
Data Plan *312#
Data Plan Balance *323#
Share Services *321#
SIM verification, registration and linkage *996#

Source: https://herofe.com/complete-list-of-unified-ussd-codes-in-nigeria