image credit: http://tygervalley.co.za/ via Google.comMTN South Africa introduced two new WoW tiers for its prepaid customers to give them even more budget flexibility and additional value in their voice and data usage.In addition to already popular WoW bouquet of promotions, MTN is rewarding customers who use R20 of their airtime with R230 free airtime and 40MB data and customers who use R25 of their airtime will be rewarded with R290 free airtime and 50MB data.Thanks to unprecedented demand, MTN has been expanding its WoW prepaid bundles to cater for a variety of customer budgets, it is also to ensure that we meet voice and data needs of our customers, says Larry Annetts: Chief Marketing Officer at MTN South Africa.As with the previous WoW bundles, customers have to opt in and can only be active on one tier at any given time. The R20 bundle can be activated by dialling *130*506# and the R25 bundle by dialling *130*507#. The promotion ends on 30 September 2014.Now customers can choose on how much they want to spend talking from as little as R6.00 up to R25.00 a day. All they have to do is to dial the relevant USSD code to get bonus airtime and data. Spend Amount*Giveback AmountGiveback Data String to dialR6.00R50.0010MB*130*501#R8.00R65.0015MB *130*502#R10.00R100.0020MB*130*503#R15.00R170.0030MB*130*504#R20.00R230.0040MB*130*506#R25.00R290.0050MB*130*507#*Usage is based on On-net Voice calls and On-net SMS only. We are really excited by these bundles as we continue to show our commitment to offer our customers the widest range of voice and data solutions for the digital world, concludes Annetts.Staff Writer Click here to read full news..