I have similar problems, see what I posted before elsewhere
===
Hi,
I have my friend's son who has a 2G , it broke the glass and someone took it to China and paid 100$ to have the whole thing replaced, before that it was OK , the local line here was woring in it.
It came back and saw the 3.0 and also I upgraded to 3.1 , jailbreak with Custome Firmware made by Pwnage 3.1 and now this is what the new behaviour is...
I put local SIM cards of my own country here , Tanzania and the phone says NO SIM
I have tried the following SIM cards and the phone works OK ... they are
Dubai DU Network SIM
France Orange SIM
UK O2 Sim
Now what makes these cards work and mine , the native of Tanzania , ZAIN , Vodacom , Tigo and Zantel to refuse to work ?
====
And today tried this
iClarified - iPhone - How to Unlock/Jailbreak Your iPhone 2G on OS 3.1 Using PwnageTool (Mac)
Still I have same problems,
Any Ideas please
Zenj