MTN pre-paid and TopUp customers who use a minimum of R6 per day on either voice or internet surfing will be rewarded with an additional R60 on-net airtime from Saturday, 21 June 2014 until Monday, 30 June 2014.
The promotion was announced in a press release on Monday, 23 June 2014.
According to MTN, the airtime can be used on local MTN-to-MTN calls, and internet browsing.
MTN subscribers will need to opt-in for the promotion by dialling *130*500#.
The usage reward will be given only once a day and will be valid for that day.
Update: MTN has issued a correction to its earlier statement saying that users can not use the free airtime to send SMS or MMS messages.