iphone 3gs gps issue

[Trranceman]

i have iphone 3gs 06.15 new bootrom, i tried everything, redsn0w, snowbreeze jb, but phone signal crashes while using gps location services, when i downgrade it to 4.1 everything works, but on ios5 it crashes, i have not found any fix yet, please post if someone knows about this issue

 

[luisadastwin]

If you go to SETTINGS -> GENERAL -> ABOUT, what is you Base Band version (MODEM FIRMWARE) in iOS5 and in iOS4?

Because when you go from iOS4 to iOS 5 version, you probably are upgrading also the baseband from the 05.14.02 version to the 05.16.05 version.

There are many people claiming that the newer baseband makes the GPS stop working!

Try downloading RedSn0w latest version and try to upgrade to iOS5 but preserving the baseband!

If you upgrade you BaseBand and then try to downgrade, since you have the NEW BOOTROM, be carefull! You can BRICK you iPhone!

 

[luisadastwin]

See my other post about GPS issues and check what I'm doing in my case...

https://forums.macrumors.com/threads/1498532/

 

[LandonDonovan]

Just download redsn0w .9.14b2 or later here and downgrade the baseband under Jailbreak options:

http://www.limerain.com/p/redsn0w-downloads.html

You might have to restore after downgrading again, but you'll see.