This has been an issue for some time. Repeatedly asking customer services to fix it has come to nought. MTN reliability/consistancy is better in this area, but speed is not as perky as Vodacom (when it does work that is ).
It seems 2 b back up again... I am browsing right now with opera on my phone... Lightning fast!!! Yipeee... It just such anoyance when the connection is down...
yip - i have a 64k simcard... 619 errors has something to do with the towers... i am not entirely sure about that though - best to check with v3g. he is a great help and bearer of lotsa good information.