I'm also having problems in Centurion. Getting 619A errors since Sunday. I'm constantly swopping between my VC and MTN sims - and the one is as bad as the other (in different ways). We in SA are being taken for a very expensive 3G/HSDPA ride. Everyone is having a go at Telkom but I must say my experience with 3G is much worse. My iBurst at work is by far the best of the lot in my experience.