Few months back, Guarantee Trust Bank, which is one
of the leading financial institutions in Nigeria came up
with an airtime recharge system that lets you easily
recharge the very phone number used in your opening
of your account simply by dialing some sets of codes of
which I covered in this guide. This time out, GTBank decided to take things a little
further by enabling her customers recharge other
unregistered phone numbers using an account owners
phone. Let’s say you own an MTN and a Glo line of which the
MTN was used in your GTB account reregistration, you
can now recharge the Glo line using the MTN simply by