Apple iPhone 3G - No GPS 3.1.3

[MrDiesel]

Hi,

I have an iPhone 3G running 3.1.3.

When 4.1 was available, I updated it and tested GPS right away (without WiFi!). It worked perfectly! It was very very accurate. Because there is still no decent jailbreak for 4.1, I downgraded again to 3.1.3. I tested GPS again (with WiFi because without it doesn't work), and it was off by 2 - 3 km (around 1.5 miles).

GPS Status (the app) reported "Good fix" on 4.1 and "Bad fix" on 3.1.3 at the exact same spot (my room). Okay, I know this is indoors, but why does 4.1 get a good fix and 3.1.3 don't?

It's not because it's jailbroken, because I tested it before I jailbroke.

I will now try 3.1.2. See if that helps. 4.0(.1) is not an option, because it's too slow.

Hoping for help

Edit:
Forgot to mention that on 3.1.3 Navigon/TomTom doesn't work at all (no GPS fix). Didn't test on 4.1 though.

 

[alidsl]

I don't know what might be causing the problems but my Dad always had problems with his 3Gs on 3.1.3 but all was fixed when 4.0 came out, and it worked on 3.1.2 aswell

 

[MrDiesel]

I downgraded to 3.1.2 and GPS Status is still reporting "Bad Fix", but the horizontal accuracy is now 500M instead of 2000M with 3.1.3. It's also a bit more accurate on Google Maps now (the right street) + it works without WiFi. I can live with this until there's a jailbreak for 4.1

Thanks for the advice

 

[alidsl]

Why don't you use 4.0?

AFAIK 4.1 is useless for your phone

 

[MrDiesel]

3.1.2 didn't solve the problem

It's just as bad as 3.1.3 was.

Isn't 4.0 running very slow on the 3G?

 

[Jamstruth]

No reason for it to run any slower than 4.1 unless you have multi-tasking hacktivated. You can tweak that using backgrounder so 90% of your apps don't multitask but radio apps etc. do use it as they do things in the background.

 

[MrDiesel]

4.0.1 doesn't run that much slower than 4.1 indeed. Even with multitasking I find it running quite good (disabled Spotlight). The GPS is worse now, lol... It's off by 15 miles. Before I downgraded to 4.0.1, I was on 4.1 where it was at the same spot as now (15 miles off)... I'll try another time when outside, probably because it uses trangulation now.