iPhone GPS signal issues

mOdO

mOdO

mOdO

Associate
Joined
13 Jun 2007
Posts
1,210
Location
London
Hey guys,

I've got Tomtom and Copilot on the 3GS, however the signal is very poor. It cannot hold a lock and even goes backwards.

I know the cradle has a GPS enhancer but I don't want to spend another £££.

The phone is on the dashboard, tilted forward and has a clear line of sight.

What else can I do to make it work?
 
You could buy another third party bluetooth GPS receiver, but it'll still cost you nearly £50 I expect.

I recently took my (or rather, it took me) Tomtom equipped iPhone upto North London, and then back through the Centre of London, and it performed flawlessly.

Where do you have it on your dashboard? It it have a clear line of sight? Do you have any kind of case or skin on it? Do you have a DAB radio (Running blind here, but I believe the higher DAB frequencies run close to the lower GPS frequencies).
 
MikeHiow said:
You could buy another third party bluetooth GPS receiver, but it'll still cost you nearly £50 I expect.

I recently took my (or rather, it took me) Tomtom equipped iPhone upto North London, and then back through the Centre of London, and it performed flawlessly.

Where do you have it on your dashboard? It it have a clear line of sight? Do you have any kind of case or skin on it? Do you have a DAB radio (Running blind here, but I believe the higher DAB frequencies run close to the lower GPS frequencies).
Click to expand...

I don't really want to spend more money tbh otherwise I might as well get a proper tomtom.

Its on a brodit holder just on one of the air vents with clear line of sight. No case or DAB....

Do you have the cradle? How do you have it, lanscape/portrait?
 
I have a cheapo ebay cradle that sucks onto the windscreen. Works very well, don't get any issues. To be honest mine works reasonably well if I put it in the cup holder near the handbrake.

Apparently resoring factory settings and reinstalling the apps can help...
 
Heated front windscreen can seriously affect signal.

The tom tom app is very poor, and a lot of people are forced to buy the add on signal booster. Which makes the purchase of the app pointless as you may as well just buy a Tom Tom sat nav!!
 
Both heated, and heat reflective (comfort glass) kills the gps signal, even the stand alone tomtoms which have a much bigger antenna can get pretty poor signal in some cars. (But good enough in most cases)

Unfortunatly while the 3Gs's GPS chip is very good, its antenna is really tiny, which hurts its sensitivity.
 
Hey guys, thanks for your comments. Just been playing around with copilot and it has held a lock throughout my 20min journey. I'm using it lanscape on the front vent with a case, so I have no idea what the problem was before...Tomtom is still a pain
 
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