iPhone 4s "No Service" HELP!!! - I have an iphone 4s and it says No service it was working last 3 weeks but after my battery went dead and I booted it back now it says " No service ". 5.1.0 2.0.10 firmware version as i checked the sim case it was "gevey sim" but now it wont work again. SOMEBODY HELP ME! please...... thanks a lot..