For those of us like me who doesn't do internet transactions, here is a list of Nigeria banks USSD codes.

ACCESS BANK => *901#
DIAMOND BANK => *426#
ECOBANK => *326#
FCMB => *329#
FIDELITY BANK => *770#
FIRST BANK => *894#
GTB => *737#
HERITAGE BANK => *322*030#
SKYE BANK => *833#
STANBIC BANK => *909#
STERLING BANK => *822#
UBA => *919#
UNION BANK => *826#
UNITY BANK => *7799#
WEMA BANK => *945#
ZENITH BANK => *966#

You can as well download Quick Bank from Google Playstore https://play.google.com/store/apps/details?id=com.coretech.allnigeriabanksussd. It automates the codes and you don't need all the confusing stars and harshs. Did I mention that it lets you see the codes you are dialing? You can even copy and paste in your dialer.