This goes to all GTB users,
GTB has just launched
a very easy way of recharging your line, which is known
as ABC method of fueling your phone just by simply dialing a code.
You can get recharge of as much as N5k directly
from your GTB bank account by just dialing*737*amount#
This services seems to be one of the fastest and easiest way so
far to recharge your mobile online.
It's only available for MTN, Airtel & Etisalat network.