iPhone (3GS) GPS not working

[Horrgakx]

I'm having trouble with GPS on my iPhone. It's a 3GS running 4.1.

Basically, it's not picking up a signal. I've tried the obvious as in checking the settings for Location Services, I've tried outdoors in a wide open space and I've also restored the iPhone in case it was a software glitch.

I've put my phone next to my mates' phone and his works fine. Mine just won't pick up a signal on the Maps application or any other app that uses GPS such as RunKeeper, MotionX or CoPilot. It might be worth mentioning that I nolonger get the message "xxx would like to know your location; Allow/Don't allow".

I jailbroke it a couple of weeks ago but because it stopped my AV cable working I pushed the original Apple 4.1 version back on to it and the AV lead works. GPS doesn't.

Can anyone shed some light on what I need to do please?

 

[JasM]

Have you tried restoring it to factory settings? (Make sure you do a backup first)

 

[tagnut]

Have you tried restoring it to factory settings? (Make sure you do a backup first)

+1 for reset back to factory settings. Backup first.

 

[Horrgakx]

Is that the option "Reset all settings"? If so, no I've not tried that.
I have however upgraded to 4.2 last night but the same fault is present.

Is upgrading from 4.1 to 4.2 the same thing as "Reset all settings" or is it categorically different?

 

[Horrgakx]

Bump...

 

[JasM]

Restoring your iphone.


Click the "Restoring your iPhone, iPad, or iPod touch" link.

 

[JasM]

Is that the option "Reset all settings"? If so, no I've not tried that.
I have however upgraded to 4.2 last night but the same fault is present.

Is upgrading from 4.1 to 4.2 the same thing as "Reset all settings" or is it categorically different?

It's different.

 

[Horrgakx]

Thanks - but I've already restored it (line 2 of my original post above).

 

[219]

How do those of you with 3GS phones find iOS4x ?

My previous 3G crashed after installing iOS4 on it and would not restore - the Apple Store kindly replaced it as a goodwill gesture , even though it was out of warranty and I have kept that one on iOS3 . I subsequently took a free upgrade to a 3GS rather than pay money for an iPhone4 and have kept this one too on iOS3 .

Just wondered how safe it is to run iOS4 on a 3GS ?

 

[Horrgakx]

My 3GS is great with OS4
Thread hijacker

 

[JasM]

How do those of you with 3GS phones find iOS4x ?

My previous 3G crashed after installing iOS4 on it and would not restore - the Apple Store kindly replaced it as a goodwill gesture , even though it was out of warranty and I have kept that one on iOS3 . I subsequently took a free upgrade to a 3GS rather than pay money for an iPhone4 and have kept this one too on iOS3 .

Just wondered how safe it is to run iOS4 on a 3GS ?

My 3GS and iPhone 4 are both running iOS4 and I have had no problems with either of them.

 

[JasM]

Thanks - but I've already restored it (line 2 of my original post above).

Is your iPhone still under warranty?

 

[Horrgakx]

Unfortunately not, it's about 16 months old. I got a 2 year contract and I'm still within that period though - if that would make a difference?

I've tried restoring the phone (on 4.2) and still the same thing. The GPS just won't get a lock with any app that uses it.

Is there an app that can display the level of GPS signal it's receiving, the position of the satellites etc... similar to my old Garmin GPS12 does? I've not seen an app that can do that and it might help diagnosis.

 

[219]

My original 3G crashed whilst running the TomTom app after I had upgraded to iOS4 , then would not reset .

I've been reluctant to put both the replacement 3G and my subsequent 3GS onto iOS4 for that reason as TomTom is one of my most frequently used (and relied upon) apps .