You can also recharge your startimes using gtbank *737# mobile ussd code.
Dial *737*37*Amount*SmartCard Number# on the phone number associated with your gtbank account.
Amount is the price of the plan you want to subscribe for. Smartcard number is the 12 digit number on your startimes card.
Complete the payment using the last four (4) digit of your gtb Naira card or
737 PIN .