No SIM card installed

[Mars91]

Hello everyone.
I have an iPhone with the 1.1.2 firmware.
I bought it maybe 2 month ago and unlocked it.
Everything worked fine since yesterday.
I woke up, looked on my iPhone and there was a message:
No SIM card installed.
It was charging the whole night.
Everytime i turn it off and on again on the upper left corner ther is always the same:
1. Searching...
2. No Service
3. No SIM card installed.

I took out the sim card and put it back in. Same thing.
Does anyone know an answer for my problem?
Thank you very much!

[wythyntime]

hmm.. see if u can restore and unlock it again...