gps testing, puzzling results - Captivate General

i went on a few drives today to test out my gps, the odd thing is i couldnt get it to misbehave in a significant way. i am using eugenes ginger clone and da_g's update.zip using his own jupiter.xml. i chose his control plane version. i also used some files from jj4 not because i thought they were better but because i was experimenting with the jm9 "FIX" files but wanted to revert back and grabbed the wrong ones from my computer.
my lbs test settings were:
Sesssion Type: tracking
Test Mode: s/w Test
Operation mode: Standalone
Start mode: Hot start
GPS Plus: OFF
Dynamic accuracy: OFF
accuracy: 50
Logging: OFF
supl settings:
server: supl.google.com
port: 7276
secure socket: off
agps mode: control plane
"use wireless networks" in setting>location and security, was not selected
i ran several my tracks trying to recreate the situation described by Da_g where the gps position jumps around and locks are lost when mytracks is in the foreground and lbs in the background but is accurate in the opposite situation. i wanted to see if any "fix" would help this situation, be it a modem file or gps library from other rom but could not create the unstable situation observed by others. this bugged me because i have had serious trouble with google maps acting erratically while all my stationary tests come out fine. the problem is i never used the gps on this rom and did not know if it suffers from this problem in the first place.
it appears this rom does not have that particular problem or the problem is not predictable or can not be caused at will.
i ran a few my tracks with jm9 files. the results were mediocre at best, did it help? nope
did it hurt? maybe, not sure but probably not.
then i ran the test with jj4 files. did it help? maybe but probably not, tests did appear slightly better but were not free of imperfections
did it hurt? nope
on each test i ran one my tracks with mytracks in the forground and lbs in the background then another with lbs in the foreground and my tracks in the background.
observation: phone did not lose gps signal upon starting any app or switching to any app like others reported. tracking results were too close to call. i used similar routes with clear skys and the accuracy was similar when compared on the same road. with lbs up front i could watch the reported accuracy, it mostly jumped from 10 to 30m occasionally hitting 5, and spending more time at 10. average was about 15meter accuracy.
then for s's and g's i ran my tracks behind maps navigation to see if navigation would aggravate the bad behavior. well it didn't. perfect results! this is both reassuring and disapointing. while i can be a little more confident in my gps which in the past has been good except when using google navigation it also make me wonder if maybe the gps is just plain unstable and cant be predicted.
did samsung get it right in the base rom that eugene worked from? did using control plane fix it? did i just get lucky today with different results tomorrow? does touchwiz somehow cause the problems(not likely but who knows)? eugene did a pretty good job of removing touchwiz from samsung sources, not true aosp but it would fool most.
did i stumble on a unique combination thus fixing my gps? im sure the answer is no. it is either in the control plane settings with da_g's mods or in the rom itself.
the jl3 modem seems to get a slightly better signal but is certainly not a "fix"
will you have similar results? dont know, try it. but be warned that the rom is giving me some funny battery reporting and the standard recalibration isnt really working. i also had some random shutdowns when i used juice defender(maybe a bad install on the app) it also is not likely to work with samsung widgets and the video player wont play those weird media hub files.
i do believe that axura was built off the same base rom (im really not sure about this, just a hunch) but i had no luck with gps on that rom, i didnt use axura long enough to try fixing it but others report it as being very good.
i wonder if anyone has looked into available ram as a cause? eugenes rom seems to have a small memory footprint and i often have over 200mb free! could minfree be killing a service when ram runs low? could a setting in other roms be killing a service when exiting some gps apps for the sake of ram/battery usage?
im not a dev and would have no idea where to start on this. i also know that much files that control gps are proprietary and cant be fixed by the community, we can only hope to identify the problem and employ a workaround to prevent problematic situations assuming that the proprietary files are infact more or less functional. will samsung employ a fix? well i think with the number of identified problems with the gps that the galaxy s was released prematurely. samsung likely rushed the release to get a bunch of ooohs and ahhhhs without doing enough testing. it appears that they are incrementally improving gps performance over several builds and it may continue to get better, maybe over several updates. untill then ill use eugenes rom. i also think that if froyo builds did not help you then you may have an antenna issue!
ill attach the my tracks file when i have time.
i would like to thank clshortfuse and especially Da_G for there efforts. Da_G i hope you find a solution that we can all use regardless of rom, or maybe you can cook up a rom yourself, people would definately use it..

Related

Observation on GPS Problems - 4800BPS

Hi All,
Like many i've had numerous problems with my GPS. I came from a Tytn II so I know how fast the unit should lock and work. In fact I've done side by side comparisons with my wife's TyTn II and am fairly disappointed thus far.
For the longest time I couldn't even lock in less than 30 mins, after trying several ROMS and radios. I used TomTom, Garmin, and Igo 8 (which I love) and issues all around.
Finally I solved my locking problem by doing the simplest of things, set the baud rate in the settings of the 3rd party GPS apps (Igo in this case) to 4800bps. Now I reliably get a lock within 60-90 seconds. I still however have lag, but at least it's somewhat usable.
Anyways hope this helps others with my issue.
Are you using Quick GPS and updating it's data when it expires, are you getting a lock with a third party app (GPS Test or HTC GPS Tool or others) before running your nav software? In IGO, when changing from 4800 from say have you tried the highest (100k+ whatever not sure of the number) baud are you seeing much of a difference in your position on screen versus your actual position?
Everyone seems to have a different story when you ask them about their experiences with their GPS on their Raphael. >_>
Btw what ROM are you using? Have you tried Sleuths GPS cab? I'm not 100% positive I have the latest cab or I would post it but there are some settings in the registry that you can change that deliver somewhat of a better experience (in my case and many others) as far as position lag is concerned. I also use the highest baud settings as Sleuth recommended.
Many thanks to everyone who is going out of their way to do some working towards a fix for Raphael's flakey GPS.
im using the highest baud on my raphael as mentioned above by X2D. there are tweaks that can be done in the registry or just find a tweak cab that has compiled those tweaks.. remember to update quick gps when it expires.. with quick gps updated i get a fix in about 20-30 seconds.. and this also depends on what radio rom you have.. i have Radio version: 1.08.25.20.. i think it's the lates. well read the radio thread on raphael section and you'll find one suitable for you , i guess i've heard somemany say that some of the older versions works better and so forth.. if you have your phone security / cid unlocked you can try the latest radio rom from blackstone on your raphael which is to be the best so far at this date... well correct me if im wrong though.. well there are another option, hot start on gps but that might consume little more battery and so forth.. read more about it on this forum

Samsung releases GPS "fix" in Market

Samsung just tweeted this:
http://ars.samsung.com/customer/usa...ID=2&PROD_SUB_ID=557&PROD_ID=558&AT_ID=310271
Basically search market for GPSRestore
No idea more then you....
Maybe not really a fix. Who knows.
EDIT - seems to restore to factory default and write to system file. Maybe a stepping stone to other fixes later?
As you said, search for GPSRestore. Don't follow the wonderful advice in the link and search for GPSSamsungRestore, like I did.
Weird - it doesn't even change your supl settings. It left mine pointing at google's server. All it did was change it to Standalone mode.
This doesn't even work. Samsung can't get a Position fix. HAHAHAAHAHAHAHAH
Removed because skinien and Radukk have all the answers
And no sense of humor
Errrrr..
If you read the description you would see that it RESTORES your lbstestmode settings back to FACTORY settings. So how the MOD EDIT does that fix anything again? The factory settings are what sucked from the start.
You guys are hyping up something that is literally 100% worthless.
This really is embarrassing
The galaxy s line was supposed to be samsung's fresh start and chance to redeem themselves and shed their bad reputation with regards to mobile device support. Having watched the debacle this GPS situation and the update situation has become, I think the verdict is in. I really couldn't recommend any samsung mobile device in good conscience.
cappysw10 said:
"During online surveillance, there is an abundance of GPS tweaks that impair GPS performance. Often times, no backup is performed to restore values prior to modifications. Samsung has released an application that restores GPS settings to recommended factory defaults for optinum performance."
Lets break this down:
"During online surveillance" => We don't have a clue how to fix it so we're looking for help from the community
"there is an abundance of GPS tweaks that impair GPS performance" => Apparently they haven't tested any of them because some of the tweaks work.
"Samsung has released an application that restores GPS settings to recommended factory defaults for optinum performance." => Their mispelling. Apparently they are still so convoluted as to think that factory defaults work at all!
Samsung, get your head out of your collective [email protected]@es. We do have to give them a bit of slack though. Being a Korean company we can't expect them to get everything right. Look at how they, South Korea, are handling the current situation with the North.
Click to expand...
Click to collapse
Let's break this down:
"During online surveillance" => We don't have a clue how to fix it so we're looking for help from the community
Or, they go online to research issues with the phone to try to fix them. It could be that they can't fix it because it's a hardware issue. Considering that the community doesn't have the driver source, I doubt that they are looking for the community for help.
"there is an abundance of GPS tweaks that impair GPS performance" => Apparently they haven't tested any of them because some of the tweaks work.
I'm sure you've read a lot of the GPS posts. People have mixed results with ALL of the tweaks. Apparently, they are changing the application settings back to standalone. I'm wondering if using MS-Based/Assisted is causing the bad tracking issues. Their app changed the mode back to standalone but left the google supl settings and I still got a fast lock. I'm not sure if I've ever tried navigation with google's supl and standalone mode.
"Samsung has released an application that restores GPS settings to recommended factory defaults for optinum performance." => Their mispelling. Apparently they are still so convoluted as to think that factory defaults work at all!
Your misspelling.
Samsung, get your head out of your collective [email protected]@es. We do have to give them a bit of slack though. Being a Korean company we can't expect them to get everything right. Look at how they, South Korea, are handling the current situation with the North.
Has nothing to do with Android. Save this for another forum.
cappysw10 said:
Samsung, get your head out of your collective [email protected]@es. We do have to give them a bit of slack though. Being a Korean company we can't expect them to get everything right. Look at how they, South Korea, are handling the current situation with the North.
Click to expand...
Click to collapse
So you expect South Korea Companies should handle military issues? That is not related unless you want make this as racism blaiming all Koreans.
Anyway this app keep failing on last stage saying get on the clear sky even I am on, full HSPA signal. JM9 modem fix might be help to me.
GalaxySsupport ATTN #CAPTIVATE users: We've created an app to help optimize GPS. Go to the Android Market & search "GPSRestore Samsung" http://ow.ly/3hEpr
LOL they are getting spammed back from everyone saying it doesn't work on Twitter
I think they are trying to create a way to establish a baseline... so if you walk into AT&T and say your GPS doesn't work, they now have a way to "test" it.
"Oh look it got a lock; thanks! Buh bye"
This isn't going to fix anything, huh? I'll give it a shot anyway, I suppose. If it doesn't work, @GalaxySsupport deserves to be spammed!
stuff said:
Errrrr..
If you read the description you would see that it RESTORES your lbstestmode settings back to FACTORY settings. So how the MOD EDIT does that fix anything again? The factory settings are what sucked from the start.
You guys are hyping up something that is literally 100% worthless.
Click to expand...
Click to collapse
Hope you don't mind, but I just posted this quote on samsungs twitter page. I agree 100%! Well said.
Sent from my SAMSUNG-SGH-I897 using XDA App
the app download page in the market has the developer phone number and email.....
just saying .........
On a completely different note:
If you look at those GPS coordinates from the app screenshots posted on Samsung's site, it's clear that the "fix" came from Samsung, Korea
http://maps.google.com/maps?f=q&sou...27.063665&sspn=0.026336,0.043559&ie=UTF8&z=17
i've installed the app and my Captivate is locking on to satellites instantly. I have it running GPS Test and the accuracy is about the same as my Tab on this rainy day on the MS coast. I hope it continues to stay like this and not flake out in a couple days.
Funny that they have the time and manpower to put forth effort into making an app that restores tweaked gps settings to their factory settings but apparently none to put towards admitting there's a problem with said settings or doing anything productive to fix them.
For my next business venture, I'm going to sell condemned houses as "new" and then offer people a visit from a wrecking crew to restore their house back to a demolished state should they try and rebuild it themselves...
mr. haison said:
i've installed the app and my Captivate is locking on to satellites instantly. I have it running GPS Test and the accuracy is about the same as my Tab on this rainy day on the MS coast. I hope it continues to stay like this and not flake out in a couple days.
Click to expand...
Click to collapse
I'm rooted and running Cog.v2.3b6 and my GPS has been working pretty damn well for a while. I'm interested in running this new app just for s&g's to see if it can improve it anymore. Will being rooted and running that version of Cog hinder my ability for this "fix" to work??
Check out this video, the Samsung Continuum has great GPS performance (accuracy anyway).
The video compares the Samsung EPIC 4G, Captivate (before and after this GPS Restore), and Continuum. There is definately some issue with the Captivate/Vibrant compared to their CDMA cousins.
http://www.youtube.com/watch?v=piTGDFeerv8&feature=player_embedded#!
GPSRestore did NOT switch to Standalone for me!?!
After reading here how the only thing the GPSRestore did for some was to change the Operation Mode to Standalone, I thought I would try Standalone mode by itself. I made the change and then got distracted and came back and downloaded GPSRestore and ran it. Then I went outside and tried to acquire a lock. FAIL.
Then I went and changed the Operation Mode back to MS-Based and got a lock within 10-15 s. This is about what I was getting prior to messing around, although the accuracy is subpar (16.4 - 32.8 feet). With a Bluetooth GPS receiver I can consistently get ridiculous accuracies (2.7 feet) that appear real on Google Maps/Nav.
Just for grins I ran GPSRestore again and it got a lock about as quickly, but when I examined the Operation Mode is was still at MS-Based! It did NOT change it to Standalone as someone else observed (not questioning their observation, just listing mine).

[GT-I9003] [FIX] Samsung Galaxy SL Easy GPS Fix

This small guide is an instant GPS Fix tried on Samsung Galaxy SL I9003 and may work on other phones. This small guide will reduce the time taken to lock to satellites and has been tested inside a building with 8 floors and I was able to achieve lock to 4 satellites.
A much better guide to GPS Fix is here : http://forum.xda-developers.com/showpost.php?p=13133654&postcount=142
Since that guide requires a little bit of manual work, so this is just a small software tweak
So here is what you have to do:
1. Turn Off GPS
2. Open LibTestMode. If you do not know how to open it then you can open it by typing the following code in the dialer (Froyo Only): *#*#3214789650#*#*
3. Under "Application settings" Change "Operation Mode" to Standalone. (Some people have reported better accuracy with MS Mode)
4. Under "Application Settings", Change "Timeout(s)" to 100
5. Under "SUPL/CP Settings" Change the SERVER & PORT to supl.google.com and port 7276
6. Reboot
NOTE: The attached screenshot is inside the building. I have received better results outside and accuracy of upto <40 feet was achieved.
Cold Start- GPS.
Hi there,
My Samsung Galaxy Pro was a bit reluctant in locking on to satellite signals, it used to take no minimum than 5 minutes.
Then I chanced upon an app in the market: "GPS Aids"... Do check it
Just wanted to know your views on "GPS Aids" & such alike apps...
Im now getting GPS lock in less than 5secs with 9-10sats in view & 7 in use inside my 3storey building surrounded my such more buildings and tall trees.
The best accuracy rate I have achieved is 2metres & most of the time it is 4metres
Thanx,
S.K.Pingua,
New Delhi.
Gps aids? does it really work so well? let me try it
Yes GPS AIDS V2 is a great software. I am getting GPS lock within 3-10 seconds on XXKB3 FW.
i'll try it and then post about thanks for the advice!
Gps aids works really well indeed, i get a lock within seconds, thanks a lot mate
Gprs
can any1 provide free gprs/3g for airtel??
is all i9003 need this fix ? cause in my device gps is OK .
awazil said:
is all i9003 need this fix ? cause in my device gps is OK .
Click to expand...
Click to collapse
Its an application, not a fix. You should try once. Its amazing...
GPS FIX i9003
I purchased my i9003 a fortnight back and had wonderful opinion , till the time i checked the GPS and surprisingly it did not work, could not understand how a product can be defective out of box. however when i googled for a fix , came to know there was significant issues with galaxy S phones
Contacted Samsung customer care , the technical folks have no clues and seems to from a different planet,all of them either denied there was a problem or asked me to do a hard reset, one tried to convince me for an hour that A-GPS worked only on network triangulation and did not have a actual gps and will give only an approximate location.
coming back to the problem , The earlier issues in Galaxy s related to configuration which were rectified by a fix and 2.2 update
the problem with i9003 i feel had something to do with the inbuilt sensor, i tried lot of software from android market including GPS Doctor, GPS Aids, GPS Fix, GPS Status, GPS test and GPS essentials among others... none of them were able to fix the problem , although few of them were able to detect gps satellites ( sometime even 12) but were not able to get a fix. the sad part was two of the apps were paid apps and total waste of money
In my trial and error approach I tried a software called Turbo GPS (its free) from android market, the major difference in this software vs. others was it had its own software to manage the sensors and after installing software the problem vanished. all you need to do is to run Turbo GPS wait for a couple of minutes and then start google maps. it worked like a charm.....
adgdeepak said:
I purchased my i9003 a fortnight back and had wonderful opinion , till the time i checked the GPS and surprisingly it did not work, could not understand how a product can be defective out of box. however when i googled for a fix , came to know there was significant issues with galaxy S phones
Contacted Samsung customer care , the technical folks have no clues and seems to from a different planet,all of them either denied there was a problem or asked me to do a hard reset, one tried to convince me for an hour that A-GPS worked only on network triangulation and did not have a actual gps and will give only an approximate location.
coming back to the problem , The earlier issues in Galaxy s related to configuration which were rectified by a fix and 2.2 update
the problem with i9003 i feel had something to do with the inbuilt sensor, i tried lot of software from android market including GPS Doctor, GPS Aids, GPS Fix, GPS Status, GPS test and GPS essentials among others... none of them were able to fix the problem , although few of them were able to detect gps satellites ( sometime even 12) but were not able to get a fix. the sad part was two of the apps were paid apps and total waste of money
In my trial and error approach I tried a software called Turbo GPS (its free) from android market, the major difference in this software vs. others was it had its own software to manage the sensors and after installing software the problem vanished. all you need to do is to run Turbo GPS wait for a couple of minutes and then start google maps. it worked like a charm.....
Click to expand...
Click to collapse
Hi adgdeepak, tough but successful experience. everyone has a share of GPS challenges, nice to know yours.
I crosschecked & double checked but could not find "Turbo GPS" on Android market!
Anyway, happy navigation
Not to take anything away from the OP author or anyone else, but would anyone be willing to test mine out? It is in my sig. If it helps you great, but its more for me to see if my theory is right that any android phone will work.
So far, it works on the Droid, Captivate, Aria, Inspire, Desire +HD, HD2, and the list goes on. I will not be checking this thread But its another alternative I wanted to point out, and am curious of its success.
'good old fix' for captivate or vibrant strikes again...same with 'press antena' one, nothing new...
again users have to fix their phones by editing service menu and with a piece of paper/coper =)
as it is PROBABLY the same BCM4751 chip - with same crappy board-antena contact as in sgs - you SL users are GPS handicapped ;]
could someone check what chip it carries?
//edit regarding hardware fix -> http://forum.xda-developers.com/showthread.php?t=878970
dont forget to say thank you samsung ;]
$omator said:
'good old fix' for captivate or vibrant strikes again...same with 'press antena' one, nothing new...
again users have to fix their phones by editing service menu and with a piece of paper/coper =)
as it is PROBABLY the same BCM4751 chip - with same crappy board-antena contact as in sgs - you SL users are GPS handicapped ;]
could someone check what chip it carries?
//edit regarding hardware fix -> http://forum.xda-developers.com/showthread.php?t=878970
dont forget to say thank you samsung ;]
Click to expand...
Click to collapse
No buddy, we do not have problem with GPS. Locks within 5 seconds with XXKB3 firmware.
I saw you your post on [ROM][ODEX] SATAN.XXJVO beta1. Would you like to help us in porting few goodies from I9000 or can you guide us whom to contact for porting clockwork recovery for I9003. Thanks in advance.
i also have instant fix, that never was an issue
real problem is with recorded tracks (eg mytracks) - while i am not moving fixed position likes to travel around, and wile moving it likes to record me off position
what bothers me is also fix stepping - every 5m not by 1m ad in my 5 years phone
as for CWM ask Chainfire
$omator said:
i also have instant fix, that never was an issue
real problem is with recorded tracks (eg mytracks) - while i am not moving fixed position likes to travel around, and wile moving it likes to record me off position
what bothers me is also fix stepping - every 5m not by 1m ad in my 5 years phone
as for CWM ask Chainfire
Click to expand...
Click to collapse
Thanks for replying. I have never tried to record tracks while navigating. Will test it and post the results here. I have sent PM to chinfire, hoping for positive response towards the custom/CWR for I9003
GPS Aids helps but not that much.. I couldn't find the 'Turbo GPS' either! Any links or directions to that app?/
rxpaul said:
GPS Aids helps but not that much.. I couldn't find the 'Turbo GPS' either! Any links or directions to that app?/
Click to expand...
Click to collapse
It is probably not available to your country yet, by google market..Just use market enabler or market unlocker and you will find it..
http://www.appbrain.com/search?q=Turbo+GPS
KonfusedGeek said:
This small guide is an instant GPS Fix tried on Samsung Galaxy SL I9003 and may work on other phones. This small guide will reduce the time taken to lock to satellites and has been tested inside a building with 8 floors and I was able to achieve lock to 4 satellites.
A much better guide to GPS Fix is here : http://forum.xda-developers.com/showpost.php?p=13133654&postcount=142
Since that guide requires a little bit of manual work, so this is just a small software tweak
So here is what you have to do:
1. Turn Off GPS
2. Open LibTestMode. If you do not know how to open it then you can open it by typing the following code in the dialer (Froyo Only): *#*#3214789650#*#*
3. Under "Application settings" Change "Operation Mode" to Standalone. (Some people have reported better accuracy with MS Mode)
4. Under "Application Settings", Change "Timeout(s)" to 100
5. Under "SUPL/CP Settings" Change the SERVER & PORT to supl.google.com and port 7276
6. Reboot
NOTE: The attached screenshot is inside the building. I have received better results outside and accuracy of upto <40 feet was achieved.
Click to expand...
Click to collapse
No such luck.
My setting were already set to the above. Not a single GPS lock.
Firmware version 2.2.1
Baseband version I9003DDKA5
Got it to work. This is specific to me.
background:
Samsung i9003 from India.
Provider: AT&T, Airtel
Current Location: California
Here what I needed to do.
1. Root your phone
2. Down GPS Aids from the Marketplace
3. Use the forced LTO method from the setup wizard of GPS Aids. (this requires your phone to be rooted. Native method does not work for me.)
4. run LibTestMode and change the Application Settings -> Operation Mode -> MS Mode (Standalone did not work for me)
5. Reboot
Looking for to use this when I go back to Bangalore again.

[Q] Understanding GPS

I have seen a lot of discussion about the Charge being very slow to get a GPS fix and I am experiencing similar issues. My previous phone, the HTC Eris, was running GSB by workshed and was extremely fast getting a GPS fix. I am currently running HUMBLECOMB 4.0 Gingerbread on my Charge. I have tried the following apps from Market, FasterFix, GPS Status & Toolbox, GPS Essentials, etc.
I feel like I have done considerable reading on the forums but still don't have a clear understanding of what effects GPS. The only thing I have done that seems to improve the time it takes to get a GPS fix is to select all three GPS services in settings but getting a quick GPS fix is still inconsistent.
What does a quick GPS fix depend on?
Is a GPS fix affected by the radio being used?
Is a GPS fix affected by the ROM being used?
Seems like the stock image of the Charge was more consistent with getting a quick GPS fix but I was anxious to try out rooted ROMs so didn't stay stock for very long.
Is there a thread that I might have missed that provides a more thorough and better understanding about GPS other than just suggesting market apps?
Thanks in advance.
GPS is NOT affected by radio or ROM, however it might differ from Froyo to Gingerbread. The GPS locks all depend on its configuration (and it's hardware, but we can't change that). All the market apps are doing is attempting to switch the assisted GPS (AGPS) servers in the hopes that you will get a faster lock. I have a thread that will change the Froyo configuration (original poster was piperat) so you can try that in the off chance that you want to try Froyo. I could start a new thread explaining how to do this on Gingerbread, but I don't use GPS very much so it's not a huge deal for me (e.g. too lazy to find out how to modify on GB).
Sent from my Droid Charge running Infinity Beta
Please use the Q&A Forum for questions Thanks
Moving to Q&A

Bad / Useless GPS reception on HTC Desire S

Bad / useless GPS reception.
Sorry for the long first post but I have been here for a while reading and absorbing all the information on here. I wonder if anyone can help me here.
Basically my GPS reception is rubbish. Lots and lots of people with this phone say it is great so it must be something wrong with my phone, either the hardware or some setting in the software.
I have posted some questions on another forum but I still cant understand what is wrong so I thought I would post on here as there seem to be a great wealth of knowledgeable people on here. Please feel free to tell me to look somewhere else if you know of some answers and I will apologise now for wasting your time.
Should I be looking at installing a different Rom, mine is the factory default, if so which one may make it better does anyone know.
Thank you very much for any help.
Keith.
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Here is some of the previous transcript which should explain the problem:
More of a rant really than a question, but I have come to the conclusion that the GPS on my phone is useless. When I first got the phone (feb 11) it seemed to work ok. I could use gps quite happily for navigation apps, but now it is rubbish. I put another thread on here a while ago saying that it could ‘see’ satellites but would not lock and give a position. Now it only occasionally sees any. Can the reception degrade over time? I am using it out doors with a perfectly clear sky, wifi on, data on, and have tried putting the phone down in case holding it impairs the signal but it is just rubbish. I loaded an app recently called GPS test (this is android btw) and this shows the signal strength of each satellite. When it eventually sees some or any, the strength is always in the low (orange SNR10) range again with clear sky etc. I recon when it does occasionally get a signal in the yellow (20 SNR) that’s when it locks on and gives a fix but I cant prove this as it does it so rarely these days. I am guessing there is something faulty with the phone or GPS receiver. Anyone know if this reception can be improved in any way? Eg. standing on your head with a finger in you ear. Anyone else have this phone and find the same as me, or is it just mine? My Nokia that I had before was great and would lock on straight away, is the HTC just rubbish?
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On quite a few HTC phones the config file is set to USA ... the file is a text file named gps.conf and resides in \system\etc folder
it can easily be replaced if you phone lets you have access to that folder, or a 'fix' can be re-flashed if your phone is rooted.
the correct settings for UK are as below, and if you want a working gps.conf file, or the flash, PM me and I can supply them.
if you can 'see' and edit your current file, and it is not as follows, then edit it as shown.
note that # signs are just comments and those lines need not be included.
## NTP Time server, use a local one ##
NTP_SERVER=0.europe.pool.ntp.org
# NTP_SERVER=0.uk.pool.ntp.org
# NTP_SERVER=0.asia.pool.ntp.org
# NTP_SERVER=0.oceania.pool.ntp.org
# NTP_SERVER=0.north-america.pool.ntp.org
# NTP_SERVER=0.south-america.pool.ntp.org
# NTP_SERVER=0.africa.pool.ntp.org
XTRA_SERVER_1=
XTRA_SERVER_2=
XTRA_SERVER_3=
DEBUG_LEVEL = 3
## Intermediate positioning, reduces accuracy, increases speed
INTERMEDIATE_POS=1
## Accuracy threshold for intermediate positioning
## 0 for no threshold causes 'Skipton bug'
ACCURACY_THRES=5000
## Enables network positioning before you get a gps fix
ENABLE_WIPER=1
### AGPS SETTINGS ###
## Use Google AGPS server
SUPL_HOST=supl.google.com
SUPL_PORT=7276
## Comment the above 2 lines & uncomment the lines below to use Orange UK AGPS server
#SUPL_HOST=agpss.orange.co.uk
#SUPL_PORT=7275
## More AGPS settings
CURRENT_CARRIER=common
DEFAULT_AGPS_ENABLE=TRUE
DEFAULT_SSL_ENABLE=FALSE
DEFAULT_USER_PLANE=TRUE
----------
I hope have fixed it. It is working great now. . . . . for the moment.
I tried lots of things, rooting the phone so I could modify the gps config file, followed all the suggestions about recalibrating it, installed FasterFix. Nothing. In fact it got so bad that it just wouldnt work at all. My next step was going to be to install a different rom to see if that made it better. I had one already to go, but first it says to perform a full factory reset. so I did this. mmmm I thought, I wonder if that makes the gps work... and sure enough this is what seemed to fix it. It now locks on with in 10 secs and is perfect, just as it was when new. I didn't bother with the rom just carried on with the original one after the reset.
So if you have a similar problem, I can recommend you do the same - perform a full factory reset.
Remember you will loose everything you have installed and all your contacts so make sure you back these up first. I then went through reinstalling all my apps and GPS is still working well. Something must have go in there to stop it working but I havent found what it was yet. Fingers crossed it keeps on working.
----------
Solution found! I had a HTC desire and sold it coz it had this issue. I got myself an s2 and same issue.I spent a couple of hours messing with kernel and stuff to no avail anyway the solution I found is: Download any giffgaff apn app from market and delete all old apns than add and delete giffgaff apn a couple of times and presto gps suddenly works fine with about a 30second time until first lock followed by about 3seconds overtime after that God knows what the apn has to do with gps but it works!
I hope this helps others with similar issues!
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Do you know I think you are on to it here. Well it defo works again at the moment after doing as you suggest.
I downloaded the app called giffgaffAPN. Deleted and re added it a few times. At first, it didnt seem to be any better but I then reset the phone and ta-da instant (ish) lock on. It has been ok since the weekend so looking good. I wonder how long it will go this time before it stops working. When it does Ill do the above again. Hopefully this is the fix. But like you I wonder why the APN settings affect it. Strange.
----------
This fix above defo worked for me to start with but now it wont. I was out the other day and needed the GPS so did the above procedure but it wouldn't work. I tried it what must have been a dozen times, deleting, restoring and resetting the phone, but nothing. It just sits there and maybe after 10 minutes it will see a couple of satellites but after 1 hour I gave up waiting for it to fix position. It is infuriating. Why is mine so bad when others say it is no problem on theirs? Time for another factory reset to see if that fixes it. Trouble is I loose all my downloaded apps which is a real pain. Anyone know how to fix this?
http://forum.xda-developers.com/showthread.php?t=1442032
Worked on every rom i tried.
All hail crypted!
Tried that AGPS patch quite early on. Made no difference to mine.
I am going to do a factory reset again to see if it works after that.
Next I might try a new ROM. Which one is best for GPS reception? Do they differ at all?
Thanks.
for me, I dont need to use any gps patch or manual edit. I dont know why, my gps is working so good. Better than iPhone 3GS. lol.
maybe my radio version? i dont know @@.
anazhd said:
my gps is working so good. Better than iPhone 3GS
Click to expand...
Click to collapse
Incredible isn’t it. Why is mine so bad then. It is so bad I would probably never buy a HTC phone again because of this. I am assuming it is the phone. I must have some faulty hardware I guess. The wife is after a new phone and I won’t be getting one of these or even going Android. Will have to spend the extra and go with apple even though I personally don’t really like these either.
Im not really sure about this, whether it's hardware problem or what. Maybe you should try flash everything, from hboot, radio, to rom. Make it variance. Maybe you can get a good gps locking somehow? :good:

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