HOW TO CHECK YOUR GTBANK ACCOUNT BALANCE BY SMS FOR FREE
Now you can check your Bank Account Balance on the Go! with the New GTBank SMS Balance Features.
HOW CAN I CHECK MY GTBANK ACCOUNT BALANCE BY JUST SENDING AN SMS?
Compose New Text Message, Then Type bal follow by your Nuban Account Number and Send to 08100550000

It's Simple! Expect your Account Balance immediately after Sending it.
NOTE:- You can only check your Balance with the New Nuban Account Number, The Old Account Number wont work.