Originally Posted by ripul
Hi all,
I have been experiencing same problem quite for some time now, i have done everything suggested on this page now. Switched on and off , manual reset by pressing home and power buttons, restoring from itunes , removing sim and cleaning dirt particles, but no sucess, my sim works on other mobile but other sim wont work on mine ( I dont have contract with ATnT ). please help!
let me know if you find something that works. I am exactly in your boat, I can't figure this out. i've done everything as well and still get "no sim card installed".