Hi, I'm using T-mobile SIM

Hi, I'm using T-mobile SIM card in iPhone 4S iOS5.0.1 and i have NO signal, before it work good. Know anyone when come the iOS Update??? I'm from Czech republic ... Thanks

Thank you, but everything is correct. I can used my old iP4, there is no problem, iP4S working only few minutes, and then lost a signal.But this is problem of all T-Mobile customers with last updated iP4S in Czech. Thats why i'm asking for Update, because i dont know if is posible make DOWNGRADE to iOS5. With this version iPhones 4S in Czech works with NO PROBLEM. In Czech nothing work corect, it is CZECH enyway

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