I have been a customer of t-mobile for two years now and have always raved about the great 3G signal quality…until this week! I live and work in S.E London and North Kent and for a week now I haven’t been able to receive a consistent 3G signal. I have an iphone 4s and have tried my sim card in another iphone but still hit and miss getting a 3G signal. My work collegue is also experiencing the same problems – very slow downloads, often no connectivity at all, a need to keep rebooting the phone to receive a stronger signal and often unable to browse. Prior to last week I had no problems at all!!!