How to fix Location Services on the iPhone 3GS with iPad Baseband (06.15)
Many moons ago, I installed the dreaded iPad Baseband on my iPhone 3GS. I did this for one simple reason: I wanted to be able to unlock my iPhone with Ultrasn0w. Unfortunately, as I was warned when I did it, this was a one-way street unless Apple releases a baseband for the iPhone 3GS with a version above 06.15 since the iPhone does not allow you to downgrade the baseband.
While the iPad Baseband had worked pretty well for a while, funny things started happening after the iOS 5 upgrade. Namely: my GSM radio and WiFi would crash when Location Services was active.
And, to make matters worse, AT&T finally decided to relent and allow iPhones they sold that are out-of-contract to be unlocked. This means I don’t have to worry about Ultrasn0w anymore, but I still have the problems created by the iPad Baseband I can’t get rid of (and quite frankly, no longer need).
- Use Cydia to install SAM, even if you activated with the original SIM
- In SAM, Go to Utilities and click on the De-Activate iPhone button (which will deactivate your iPhone)
- Download the latest version of Redsn0w (if needed), use the jailbreak option against your phone with no options checked (even Cydia). This will re-apply the “fix” during hactivation.
- When phone reboots, deactivate again with SAM
- Re-activate your phone with iTunes or, if you don’t have your original SIM, use SAM to activate it again.
The steps appear to work for iOS 5.1. I will have to experiment more and see if I catch it crashing the radios again.