Everything is easy these days through the use of codes. The same can be said about loading your Swift Network internet. In Lagos, many people depend on going to a nearby Swift network office to load their internet. They waste time and money on something that could be done easily on their mobile phone.

If you don’t know how to load your Swift internet airtime, take note of the following steps:

Dial *737*50*Amount you want to pay*4#
Enter your Swift Network ID
Enter the last 4 digits on your GTBank ATM card, or the pin to conclude.
Viola! You’re done.
This works very well if you’re using GtBank.

http://medianet.info/2017/06/09/nigeria-how-to-load-your-swift-internet-through-your-phone/