iphone3g t-moblie fault

[1604error]

Hello, I recently updated and jailbroke/unlocked my iphone 3g os 3.0 using redsn0w. I then used ultra snow to unlock my phone. Everything has went well but I can't call out using my new t-moblie sim card. Not even 150 in the UK. I get full signal but can't do nothing with it. The phone works on my blyk sim for a while. E.g I made/received calls but does not work on t-moblie? How would i even top up to activate the sim when I can't call out?

P.s iphone does not work on o2. May have been blocked from the network.

[sneakyg]

i have the same problem. seems theirs no solution.

some have said to try a new t-mobile sim - i dont know how new your sim card is? somthing about their being different voltages between old and new sim cards.

im unsure how they define the sim card from being from a new batch or if their is a way of checking without buying a new sim

if u do find out, please let me know