Buying airtime or data is easy:
1. Tap the 'Transact' button and choose 'Buy airtime and data.'
2. Pick airtime or data.
3. Select your service provider and enter the number you're buying for.
4. Choose the amount.
5. Select the account you want to pay from.
6. Tap 'Pay' and you're done!
7. You'll get an SMS with your airtime/data details.