Wireless
PP123, I agree with GateCrasher, 3G is better, but judging from your prefix 474, you are in Industria/Bosmont/Riverlea area. Vodoacom signal is not to gr8t in those areas, so intermittent 3G connections, MTN is a bit better as you would get Edge speeds. I would steer away from Iburst, look at Sentech as well, I tried it in that area and gets OK signal.
PM me and I can point you in the right direction.