Update your personal information without visiting any branch in these easy steps; - Visit www.gtbank.com - Log on to the GTBank internet banking platform - Click self-service on the menu (Left) - Select Customer Information update - Click New Request - Then, select account number and update type. For example, if you want to update your mobile number; -Select Mobile Number as update type. -Enter your new mobile number -Answer your secret question -And you are done! With Internet Banking, you can