UBA dial *919*10#  from the mobile line linked to your account


Fidelity Bank dial *770*911# from the mobile line linked to your account


IBTC Bank dial *909# from   the mobile line linked to your account


Zenith Bank dial *966*911#


First Bank send Block to 30012 via text message


Union Bank send BLOCK CARD NUBAN to 20123


Key stone Bank call 23470020003000


Sterling Bank call 070078378464 


GT Bank *737*51*10#


Stanbic IBTC Bank *909# select my bank and select service request then select block card


EcoBank text STOP ATM your account Number to 0806326226


FCMB Bank call + 2342798800


Access Bank call +23412802500


Polaris Bank call +2341270850 


Wema Bank call 08039003700


Note! Knowing how to Block your account is very important because in times of emergency running to the bank might be too late more especially during weekend. So share as it might help someone.