For now, airtime and mobile data purchases are available to our South African users only.
More info is available here.
To buy airtime, you'll need to do the following:
Add an airtime beneficiary for the number you want to send to
From the HOME page, click on MORE to open the menu
Click on BUY PREPAID AIRTIME OR DATA
Select either your Bitcoin account or local currency account as the source
Select the telephone number (added in #1 above) as the recipient
Select your airtime or data package, add a note (optional) and you're done!
If you purchase R10 airtime/data using your local currency account (ZAR) as source, the system will deduct R10 from the local currency source.
If you purchase R10 airtime/data using your bitcoin account (BTC) as source, the system will deduct the amount of bitcoin equal to R10 from your bitcoin source.