Read-only archive of the All About Symbian forum (2001–2013) · About this archive

Why Is The GPS So Slow

37 replies · 9,058 views · Started 03 December 2007

Found the post where the picture is, but its not loading 🙄

However, heres the text, from N95 users:

but for future reference I managed to fix my problems (one of the pictures is from somewhere on this site, but helps explain greatly). I found one of my little antenna pins was just touching the side of the case (you can just make it out in the picture - it's the little gold dot). All I did was push it towards the innards of the phone with an old needle, and boom, all my GPS problems were fixed. No special tools were needed (other than a needle and credit card to get the case off).

Got it, must have been problems with the site or my connection.

Please note this is taken from N95 users, so credit there rather than me.

Also note that opening the case may well invalidate the warranty, and obviously give you the chance to damage some senstive stuff inside the phone. I suggest reading up on guides first.

Attachments: GPS antenna.jpg

Peter321 wrote:Make sure that A-GPS is enabled, AND that you have set an access point to use as well as the correct server address for the A-GPS data.

A friend of mine who owns a 6110 complained about slow GPS fix, and I checked his settings.

Everything was enabled, but the server address was some long weird URL.

We changed it to: supl.nokia.com

Now he gets a fix in 5-10 seconds !!! (just like me on my N95-1).

The data usage is about 6KB each time, which is nothing unless your dataplan has a minimum charge for each time you use it.

Are you saying that on my N95-3, I must enabled both Assistd GPS and Integrated GPS?

If I do this, my Garmin Mobile XT, Nokia Maps, and Google Maps goes haywire. Probably it doesn't know which one to use...

dchky wrote:A-GPS will only cost you whatever the phone company charges for a few kilobytes of data each time you use it.

I don't personally find the N95 any slower than a whole bunch of hand held GPS's from Magellen or Garmin. The reason it is slow is because it wants to get the ephemeris information just about every single time the phone is restarted, or the GPS hasn't been used for more than a few hours - ok minutes 😊 This stuff comes in at a pretty low data rate so it takes a while to gather. Can take even longer in places with poor reception.

there's one thing I don't get: why are most current GPS devices (not only the n95) so stupid that they don't save the ephemeris information for a week or so?? I mean satellites don't fly faster than the earth rotates so the satellites you get a lock from are the same (as long as you don't travel 600 miles), have the same frequencies and nearly the same positions. Why on earth does e.g. the N95 download THE SAME ephemeris information if I switch on GPS after two or three hours? I usually don't travel with 300 miles an hour... there should be at least a setting so the businessmen among us who travel by plane every day can have a fast GPS lock when they have a meeting in Washington. In my 6 (!) year old BMW 530d I get a GPS lock almost immediately (around 5 seconds) and without AGPS (or network based support) at all!

emerher wrote:there's one thing I don't get: why are most current GPS devices (not only the n95) so stupid that they don't save the ephemeris information for a week or so?? I mean satellites don't fly faster than the earth rotates so the satellites you get a lock from are the same (as long as you don't travel 600 miles), have the same frequencies and nearly the same positions. Why on earth does e.g. the N95 download THE SAME ephemeris information if I switch on GPS after two or three hours? I usually don't travel with 300 miles an hour... there should be at least a setting so the businessmen among us who travel by plane every day can have a fast GPS lock when they have a meeting in Washington. In my 6 (!) year old BMW 530d I get a GPS lock almost immediately (around 5 seconds) and without AGPS (or network based support) at all!

If I am not wrong, most newer GPS "memorize" their last location. In a new location, it'll do "Cold Start" but still can lock pretty quickly. This is what my TomTom GPS and Sprint Mogul (with AGPS) do. BUT, the integrated GPS and AGPS function in the N95 are just really bad at picking up satellite. I don't know if its defective GPS or just bad implementation.

I travel a lot, even out of States and the longest my Sprint Mogul get a lock is 45 seconds.

Should I send my N95 for "repair"?