Originally Posted by boe (Post 296815)

Hello,

I've read many posts about how they do the firmware update, the GPS works great the first day and not the next. I don't think I noticed a solution or conclusion as to why this is. I've done about 4 firmware updates myself and found that to be true as well.

I'm guessing Sprint either downloads something to your phone that disables it or they somehow track your GPS usuage - those are justs guesses of course.

Anyone have any insight as to why it will work for me one day and not the next even though I test from the same general area - 4 bars of signal, EVDO access.


Thanks

FYI - I did another firmware update this weekend - first time I could use GPS without priming it with GPS viewer - using 3.02 chef downloaded on Saturday like 5/24 - not at my home PC right now. Radio 3.35.04 PRL 60711

Originally Posted by yeaidid (Post 296956)

I thought mine was broke too, go here: http://forum.ppcgeeks.com/showthread.php?t=26410

I can't tell you how much this helped my GPS issue!

Originally Posted by JOLLYROGER

And now some final notes about slow satellite tracking (GPS 101 if you will...):
All GPS units store information about the GPS satellite constellation. These are not geo-synchronous satellites like DirecTV or Sirius Radio. They are in lower orbit and are constantly moving.

Once locked on, the GPS satellites move in and out of visibility, the GPS stores a running log of when and where it last saw a particular satellite allowing it to more accurately predict when it will see that same satellite again and approximately where that satellite will be in orbit at that time. The more accurately a GPS can predict a satellites location, the quicker it will lock on to it.

Since the entire constellation cycles every few hours, I left my phone sitting docked on the cradle over-night running Google Maps in GPS mode in order to let the GPS unit build up a good solid almanac of the constellation. This morning I'm consistantly able to track 7-9 satellites at any given moment and it only takes seconds to lock on after exiting the program. This includes hard resets, soft resets, standby mode, etc.

All that said, the longer you let your GPS run, the better it will get. Conversely, since the satellites do shift orbit somewhat, the longer you let your GPS sit between uses, the more out of date your almanac becomes, and the longer it will take for that initial lock on.

Originally Posted by shadow-tech (Post 296995)

i have promised to try this but havent got to it yet. a few said it it works

Originally Posted by ScrapMaker (Post 296960)

I'm guessing he already did this... so did I, and I still have the issues..

When it WORKS, it works great... usually less than 10 seconds for a lock... but when it stops, it's dead... soft-reset is the only way...

I wish there was a way to truly STOP the GPS driver when you weren't using the chip... save battery... then start the driver when you needed it...

Originally Posted by ScrapMaker (Post 296960)

I'm guessing he already did this... so did I, and I still have the issues..

When it WORKS, it works great... usually less than 10 seconds for a lock... but when it stops, it's dead... soft-reset is the only way...

I wish there was a way to truly STOP the GPS driver when you weren't using the chip... save battery... then start the driver when you needed it...