Just as rumours suggested South Africa received the iPhone 5 A1429 GSM Model. They A1429 Model supports LTE on Bands 1 (2100MHz), 3 (1800MHz), 5 (850MHz).
CellC will be using the 2100MHz band with Vodacom and MTN both using 1800MHz. 8ta is reported to be using the 2300Mhz band which is not supported by the iPhone 5 or iPad.
Vodacom and MTN have both opened their LTE networks to the public while CellC have stated that they will open theirs by the end of 2012.
LTE currently is not enabled on the iPhone 5 as it is awaiting Apple's approval. Once approved carrier settings will automatically be pushed to the iPhone 5. We already know what these settings are and can enter them manually on an iPhone 5 however the networks have blocked the iPhone 5 from connecting to the LTE networks.
This means that there is no way to connect to LTE on an iPhone 5 in South Africa at the moment.
We have no expected date for the apporval of these settings but will keep you posted.