Hi, I accidentally updated my iPhone 3gs from 3.1.2 (unlocked) to 5.1. After this, I jail broke using redsn0w and tried to unlock with the ultrasn0w/fixer, but i keep getting searching/no signal. Also, under the "about" screen in system prefs, it says "No SIM" under the ICCID. Modem firmware is 06.15.00. I have a feeling that the sim contacts may be broken or something (a friend of mine was trying to fix it and i think he may have somehow broken the sim contacts.) If this is not it, then what is the problem? Thanks for any and all help!!