Fix Jailbroken and Unlocked iPhone 3GS’s No Service Error

Many iPhone 3GS owners have been complaining about getting "No Service" after jailbreaking an unlocking their devices. This is happening because of a GPS failure after upgrading the device to 6.15.00 baseband. Here how to fix that.

Many may wonder why can’t I downgrade my from 6.15.00 to 5.13? Actually till now there is now way to do that. The dev team is still working on that. But Here’s a few tips which may help fixing the No Service error on iPhone 3GS after jailbreak and unlock :

• Install Ultasn0w 1.2.3


• Remove and reinstall ultrasn0w: Open Cydia, search for ultrasn0w > Modify > Remove, then search again for ultrasn0w and install it.


• Reset your network settings: Open Settings > General > Reset > Reset Network Settings


• Eject your SIM card > turn OFF your iPhone, Wait a few minutes > turn on your iPhone > re-insert your SIM.


• restore your device to pre-jailbroken custom firmware using Sn0wbreeze or Pwnagetool then Re-jaibreak and Re-unlock it.

[Via]

Posted in: Jailbreak Iphone