yashsingh1/xdaforums huggingface dataset:
[Galaxy S I9000 General] badmrfrosty:
Program is called "GPS Test" its free on the marketplace
[Galaxy S I9000 General] appelflap:
I've observed that given the default accuracy setting of 50m in the GPS Setting program can result in way too tolerant fixes. If one set these setting to, say 10m, fixes of greater than 10m aren't tolerated with the result that in a gps navigation or mapping program one doesn't get postitioned all over the place :)

This is something I wanna investigate a bit more. But I think that it's actually not good that the gps settles for a 30m fix.. better is it to neglect that fix and search for a better one.

Initial tests didn't gave me a substantial loose of fixes.

(of course it could be that this all discussed yet in this or other threads. In that case, neglect my suggestion)
[Galaxy S I9000 General] drkhalaf:
gps fix ??

i think this has been mentioned before but american users of the galaxy s are reporting much improved gps functionality by following the steps below:

1. Disable “Use Wireless Networks”;

Navigate to Settings > Location & Security > uncheck the box next to “Use Wireless Networks”

2. Go to the phone and dial *#*#1472365#*#*

This step throws you into LBSTestMode menu

3. In the LBSTestMode menu change “Operation Mode” to MS Based

In the LBSTestMode menu, find “SUPL/CP Settings” and change the SERVER & PORT to supl.google.com and port 7276 (DO NOT use www. in front of supl)

4. REBOOT

5. Enable “Use Wireless Networks”

(Navigate to Settings > Location & Security > check the box next to “Use Wireless Networks”)

cheers
[Galaxy S I9000 General] appelflap:
Beware... they come and get you :D This was posted in these forums before.
[Galaxy S I9000 General] Rawat:
http://twitter.com/samsungukmobile

Is that real? I'm going to tweet them, and see if they respond to the GPS problems.
[Galaxy S I9000 General] netdudes:
JM2 from where please?

Hi, I use samsung-firmware.webs for the latest firmware, they are showing JM1 as the latest, where can I get JM2 from please?

Thanks
[Galaxy S I9000 General] larryccf:
thanks - appreciate
[Galaxy S I9000 General] badmrfrosty:
Have a look in the thread in the "Galaxy S I9000 Android Development" forum here. I downloaded the firmware from the link in the first post
[Galaxy S I9000 General] ghosty_uk:
hiya im a newbie to the SGS, i have only had it since tuesday (previously had a touch hd, till it fell out of my pocket and got run over), anyhow i upgraded to the SGS as the desire is very very low stock in the UK.

and what can i say the gps performance is bollox, im currently sat in my room next to an open window, i have gps test running.

it can see 2-5 satalites, it has 0 in use, accuracy is about 200 - 350 ft.

last night i tried google navigation, and it never got a lock on a 40 minute drive, yet i also tried skrobbler and that have my fix more or less straight away. not tried it on a actual drive yet,

so in summaration compared to my touch HD where the lock was more of less instent and using garmin mobile XT. this is a much worse gps, and that was one of the reasons i got the phone. so where do i go from here.
[Galaxy S I9000 General] michael0702:
How to make gps work!

Settings > location and security, disable USE GPS SATELLITES, then enable again. And it will work.

I always turn mine off when not using navigation, probably why I never had any problems with it.

Mine always find 10-11 sats. and lock on 7-8, which gives me 5m accuracy.
[Galaxy S I9000 General] AllGamer:
it's also a GREAT ! tip to conserve battery life :)
[Galaxy S I9000 General] sjdean:
I tried upgrading to XXJG5. While I appear to get a more stable signal, there seems to be some buffering.

If you use programs like MyTracks or Waze, you may lose the GPS connection, and the GPS will still think you're 100 feet away. But this time, instead of zig zags, it seems to think that you have to be there and it has to draw in the map until that point has been reached.

I got some REALLY odd tracks in Waze and MyTracks.

I never had this in my newer SGS running XXJF3, but that eventually too crapped out on me after a couple of weeks.

Im beginning to think that this actually isn't firmware but a really bad design and rather than fixing the driver and the reporting of the data, Samsung are just putting in hacks to try and get around the issue. Mmmmm.

Cya

Simon
[Galaxy S I9000 General] larryccf:
SJDEAN - while i don't know the answer as to whether it's hardware or software, i suspect you may be onto something

what's troubling me is finding about 12 folks, like myself, whose GPS was exceptionally accurate, and then after anywhere from 5 - 10 days, it starts demonstrating the issues

don't understand why it would start out fine and then go south - i can understand corrupted software but ....

mine went squirrely on me last nite - going to test it again tonite -

PS- had to run to our attorneys office, so i let our runner drive while i monitored the GPS on the vibrant - afraid mine has gone south totally - GPS Test showing 14 sats in view, 0 in use

at the same time for 75% of the 7.9 mile trip it showed us to be exactly where we were, the rest of the time it might show the car over in a field 75 yds off to the side, or pointed 90 degrees in the wrong direction -

then i had the runner purposely take a short cut that was not routed in the route Google Nav had set up, and it took it 1/4 mile to start rerouting and another 1/4 mile to complete the new route - that wasn't lag, that was it trying to really know where we were (my MyTOuch 3G would have done it inside of 3 - 5 car lenghts and been announcing the new next turn).

I'm afraid i'm thinking this phone's going back - i'm not willing to gamble on samsung sorting this mess out as the asian units have been out now 2 - 3 months and they're still experiencing it

and if it proves to be hardware, i really doubt samsung will step up to the plate. If i return, i can always buy it again if they do straighten the issues out
[Galaxy S I9000 General] Beards:
So the replacement Galaxy S Clove gave you is also playing up Simon?
[Galaxy S I9000 General] madmackem:
went out today using my gps for the first time, drove from tyneside to teeside about 45 min drive only lost signal twice for any amount of time, once on a sliproad it thought i'd turned off but was ok in about 15 seconds and again for about 30 seconds in heavy industrial area. JG5 firmware
[Galaxy S I9000 General] ghosty_uk:
tried this and i got a better signal but google still jumps form point to point, it dont seem to be able to smooth tracking, skrobbler did the same, but i check the sat usage, info in skrobbler and it said it was tracking 5 satalites but only locked to 3.

which shows the gps hardware is fine, which would lead to either a software issue, or some kind of software to hardware interface issue, which i imagine can be fixed.

i mite try emailing samsung support as my phone is like 4 days old, or i could try and get a new one from where i got mine phones for you. i have there insurance policy and in 4 days you dont expect this sort of issue.

michael0702, i wasnt actually aware i could do that, as i said i have only had the phone a few days so im still learning the functionality, one thing i have noticed is the battery life is pants, it only lasted a day.
[Galaxy S I9000 General] sjdean:
Yes indeed.

But don't get me wrong.

The old one was unusable. Flat plain, unusable. It would jump around left right and centre, typical zig zag tracks in my tracks at any opportunity.

The replacement was much better, and for a couple of weeks held its own. But it has started to deteriorate. Not so much in the view that I get zig zags, but that it loses lock.

Strange goings on.

XWJG5 seems to smooth things out, but whatever algorithm its using, XXJF3 is much better.
[Galaxy S I9000 General] badmrfrosty:
Update to my test done with the newly released JM2 firmware. I am currently sat on a bus travelling from Prague to Bratislava. I have had gps on the whole time. While stationary at the bus station the gps lock had my position to 5 metres and all looked great. When we started moving it was a totally different story, i havent been able to maintain a lock since we left an hour ago. Conclusion, new firmware makes gps great when not moving but its still beyond useless as a navigation device.
[Galaxy S I9000 General] Seifer1975:
There is a very simple solution, though not perfect if you want the gps to lock on faster and hold on to the satellites. In the lbstestmode menu, change accuracy to a bigger no. I am using 140 now. I also tried setting it to a very small no and the gps will not lock to any satellites, even those with snr >30.

Be warned though that your gps will not work if the no is too big.

Edit: I tried with 150 and got once it locked on to 3 satellites with snr 19, 19, 18. The columns are orange.
[Galaxy S I9000 General] blessonje:
mine is the worse case.. I tried to find my location many times..but aftr a lot search it says 'Your location is temporarily unavailable'...So for me i bought a $600 mobile which doesnt have a GPS...Simply sucks..:(
[Galaxy S I9000 General] sjdean:
Do you get a consistent lock, or do they just flash orange once and lose signal?

I get that all the time, which suggests that part, the SnR <20, is at least a firmware bug. It's still disturbing that it's been 4 months (3 months in pre-production from announcement to release, and 1 month til now) and still no fix.
[Galaxy S I9000 General] Tyxerakias:
I'm on holidays now in Greece and I'm happy with my GPS.

Before I left, I tried everything that was suggested here and I mean everything. The last thing I tried, with which I noticed a much stabler lock but still not great accuracy when I tried on the bus (I don't own a car in London), was deleting the secgps.conf file (in /data/gps), which is autogenerated when you run that secret test menu. When you reboot the phone, it generates it with its default settings, which include NUM_OF_FIX=999999999 instead of 0, and do not have TIME_BTW_FIX=0. Also SESSION_TYPE is changed to 2, instead of 1 and SERVER_MODE is 0 instead of 1.

If you run the *#147.. test, it immediately gets overwritten with the other values, even if you don't change anything in the test (This means that if that file plays a role in the GPS settings, you have changed it just by entering the test code, and you should change it back anyway! - by deleting it and rebooting).

I have no idea if this is what made a difference. But these last few days in my car, with the phone in a car holder, I have been navigating with Sygic and not a single drop, and even the displayed speed is correct most of the time. I can't ask for more from an in-car GPS. It's still not as extremely accurate as my old external bluetooth GPS that I used with my Nokia, but so far it hasn't failed to tell me 'turn' when I should. I'm very happy with it.

Simon, since you have rooted your phone now, you can try this and see if it makes a difference.

My wifi and wifi location is off, but I don't think that matters.

I have limited data here, so I set it to 'always 2G'. I also have the gps.conf (in /system/etc) set to the european ntp server, but I also don't think that matters, since I don't use A-GPS.

Unfortunately I still don't think it's usable for walking. GPS Test shows that it loses fix when the screen autorotates, and I also think the reception is affected by holding it with your hands (someone else has mentioned this too). I will test this further in the coming days.
[Galaxy S I9000 General] Evans_Prophet:
Tyxerakias, the reason why the gps is so much better is probably the Greek clear blue sky.

Furthermore, the number of viewable sats changes over time from 6 to 12. So if you tested when 12 sats were passing by over the area, your results would be much better than if only 8 were passing by...

http://en.wikipedia.org/wiki/File:ConstellationGPS.gif

Sygic works for me as well fine, but this is probably due to other reasons (e.g. sygic knows / expects your path).
[Galaxy S I9000 General] Beards:
Broadcom InConcert BCM20751

The Broadcom InConcert BCM20751 Combo Chip

Have a read of that guys...... and Mark (TravUK), if you are hanging around ~ I know you can't say too much but I will ask... comments my friend?
[Galaxy S I9000 General] hkmatt:
Best firmware for GPS is ZSJF7

Hey all,

I have recently bought three SGS phones from different countries/regions with different firmwares. The first was a UK model and I was annoyed as GPS was useless. I flashed up to JM2 but there is no difference...did all the tweaks in the hidden GPS menu....but still no way. I bought the Chinese model yesterday with a June version of ZSJF7 and it is spot on I have GPS connection within seconds of up to 10 satelites. I had the others SGS phones right next to them and they got 1 satelite...yes: 1 (!!!), so I tried various firmwares....finally I flashed them all to the CN ZSJF7 and now it is a dream. It's also faster than JM2, but has less features....so if you want a GPS fix...get ZSJF7.

Cheers
[Galaxy S I9000 General] eaglesteve:
I just flashed JM2 and completed it a few minutes ago, because I was so frustrated with my GPS. I tried the tricks in a few thread already but they don't solve the problem. I was hoping that JM2 would solve it, but you say it doesn't?

Where can we get this ZSJF7? Any link to a server with reasonable download speed?

Thanks you for your info. Cheers.
[Galaxy S I9000 General] hkmatt:
You can go to samsung-firmware*webs*com/samsungi9000*htm to download it...sorry I cannot post links here so substitute the "*" with "."

Make sure you take ZSJF7 and not XXJF7.....

Let me know if it works for you....
[Galaxy S I9000 General] eaglesteve:
Got it. Downloading now.

Thank you very much. Will let you know if it works for me.

BTW, what pitfile do you use when you moved from JM2 to this?
[Galaxy S I9000 General] mika34:
Guys did you try this settings? works for me perfectly

In Settings turn off "Use wireless networks" in Location and security.

put on dialer *#*#1472365#*#*

"Application settings" > Operation mode set > "MS Based"

In "SUPL/CP Settings" change server on : supl.google.com and port on 7276 (or 7272 if 6 doesnt work for you)

Restart your phone

Turn back on Use wireless networks ( i did`t )

LET ME KNOW PLEASE. Hopefully will work for you
[Galaxy S I9000 General] eaglesteve:
You got this from a thread that says something like 101 in GPS right? I read that thread and noted that your setting is the same as what was mentioned there.

I had tried that just before I flashed to JM2. It didn't work. I used a tracking program to plot my position and drove around. It was all over the place, and stop tracking in the middle of the trip. I did a second test, by remaining completely staionary. The recorded "trip" showed me moved to a lot of places, some half a kilometers away, some about a kilometers away, although I didn't move.
[Galaxy S I9000 General] mika34:
Oh sorry. I did`t try to drive with it yet. Just bought it yesterday and when applied new settings got 7 setalites (before 0!).

I had HD2 before. And i`m still big noob in this "new world" of adnroid and samsung.

Would you just tell me what JM2 is? I went on that page with all the firmwares and don`t know which one to chose. You saying I9000ZSJF7 and there is newer from I9000BUJF5 2010 July is that not good?
[Galaxy S I9000 General] mohamtha:
Not working for me, i am in Hong Kong, the best setting for me is original setting in zsjf7, but still not as good as magic i used before
[Galaxy S I9000 General] hkmatt:
@ mika

You are right JM2 is the latest and you can find many pages of people discussing it. I installed it and it did not help with my GPS problems, also it is slower than previous versions. But there might be other bug fixes instead and there are some changes in some apps, e.g. a new task manager, etc. However, by trying several firmwares in parallel (I have three galaxy devices) the CN ZSJF7 was the best for GPS reception....just my test experience...
[Galaxy S I9000 General] hkmatt:
@ mohamtha

Where did you buy your phone?
[Galaxy S I9000 General] eaglesteve:
Just for anyone interested to know, JM2's settings are almost identical to what mika34 mentioned in post #5. The only difference being that the Operation Mode is Standalone rather than MS Based.

I've done some initial testing. The result has been mixed. It does seem a little better than what it was in JF3 though. Using googlemap driving around, the blue dots wonder off to the neighbouring street often. Also, whenever I turn corner, the blue dot continues ahead and takes some times to come back. I also notice considerable lag between my actual location versus the dot.

It is an improvement over JF3 in that I no longer see the cursor going off to somewhere ridiculously far away anymore. It's off, but still quite nearby.

I'll continue testing with different software and see how it goes.
[Galaxy S I9000 General] Tyxerakias:
This English summer has been unusually hot and clear. In the last month that I have the phone I always tried under clear English blue skies. Actually there have been days last month when Athens was rainy and London was warm and sunny. So, nothing to do with the skies. I could see 12 sats in London as well. Besides, clouds should not affect GPS signal.

As for the time, I have used it at all times, with 8 and 12 sats.

As I said, it's not suitable for walking. But I have no problem with driving.
[Galaxy S I9000 General] Beards:
Yes , I've taken to walking around the hills with a steering wheel around my neck and a car door under my arm (with the window open of course because it's hot) but it still doesn't fool the GPS. :D
[Galaxy S I9000 General] sjdean:
GPS on XWJM2

Im still not a bit fan of the GPS even on XWJM2.

Seems to be much better for walking, but the fix, if you can call it that, doesn't seem to resolve the readings from the GPS, doesn't improve the sensitivity, or accuracy, or allow SnRs < 20.

What it seems to be IMHO is buffer the readings.

Where XWJG5 seemed to put you 100 metres off and then spend time calculating a path between last known good and where it thinks you should be, even if the GPS was restored in the meantime, XWJM2 seems much more resiliant in plotting a path based on speed and course.

But there are still really odd anomolies that cut off corners and quite literally have you going in circles.

I do have a map I can upload, but I just need to edit it slightly to remove the start.

Cya

Simon
[Galaxy S I9000 General] dakine:
JM2 seems to better than JF3 at least for driving. I took a 2 hour drive with overcast conditions and it was flawless using sygic mobile maps. My disclaimer is that I was using a cradle this time so it could be that that gave me better reception vs having it taped to my dash :) Looking at gpstest it's clear that it's still not as good as it should be.
[Galaxy S I9000 General] ruskprick:
wierd thing!

Im using Swedish version,and co-pilot works just fine.Much better and more precise than my old diamond wm6.5 tomtom.

version I9000XXJF3
[Galaxy S I9000 General] sjdean:
Try MyTracks and tell me how pleased you are with it then.

At least on JF3, when you had zig zags, you knew it didn't have a lock.

JG5+ pretends it has a lock but can cut corners out and back track on you. It pretends that you are somewhere when you're not.
[Galaxy S I9000 General] miker71:
I got caught by JG5 for driving today which was my first "real world" test. It was overcast and it said it got a lock but then I knew something was wrong when Google Navigator was not updating my position! So I switched to Navigon but there the navigation could not even get started because it could not get a lock.

I think the initial Google Navigator lock was from WiFi (since I have that checked).

I'm not sure if it was the weather conditions - previously I'd tested GPSstatus and it found 5 satellites. Because I needed to be somewhere today I didn't have time to compare the nav apps with actual GPSstatus :-/

As it is, I'll be taking my standalone TomTom on my next journey!!
[Galaxy S I9000 General] alain57:
guys you need to TEST the GPS

i was all happy to flash with GM2 because a lot of NOOB said it is better for GPS

And Today i test the GPS with navigon (i also have navigon on my iphone 3G)

and guess what =>

it is complete useless on the SGS

I have a fast fix ok that is cool

but the GPS see me once on the right street, once two streeet nearby....

so having a lady on the SGS that tell you every 3 seconds that you need to turn back is useless

so please guys, stop SAYING that the GPS is better with one specific firmware because you have a fix in less than 1 min or because you have a signal in your house....

this is not the main use of a GPS

it could have 8 satelits in less than 1 ms and could be **** if it still don't know exactly with a damn good precision where you are....
[Galaxy S I9000 General] sjdean:
I agree with Alain.

I think JM2 also introduces a bug in that it doesn't seem to be using A-GPS anymore. Many times, when MyTracks would find me to within a 100 metres or so thanks to A-GPS on JF3, MyTracks under JM2 will tell me it cannot find me unless the GPS is locked.

The behaviour I saw on JF3 is that if you lost signal, you would bounce between sateliites and mobile phone base stations trying to triangulate your position. You would see zig zags all over the place.

Under JG5, I saw some buffering introduced that made it much better for walking, but if you lost GPS lock, it may still put you 100 metres away, then work out a path between last known good and where it thinks you should be, even if you got the GPS lock back.

Under JM2, this has been refined somewhat in that it appears not to have you jump all over the place and will base decide your position based on last known good position, speed, and heading and will attempt to keep you on that track if GPS is goes down.

Trouble is, if you do a sharp 90 degree turn and the phone has to spend a while getting a lock, you'll see these mysterious overshots which slowly turn back onto the normal path.

I've also seen some instances where I'll a track go back on itself.

I think Im going back to XXJF3. At least you knew when signal wasn't working.

Might root the phone and try the repair on secgps.conf and gps.conf
[Galaxy S I9000 General] appelflap:
Weird, I used the gps today for a walk through the forest.

I just couldn't get a fix, but after changing the time between different GPS measurements from 2 to 1 second (something I did in the Oruxmaps map program I used) I had a constant fix and it stayed fixed during the whole walk (1,5 h)
[Galaxy S I9000 General] milsjg:
Just came home from a walk in the forest. Perfect tracking from my GPS. I think if you analyse the comments that there are a few people that has a severe problem with the GPS. I do not know why, but they should think of getting a replacment or buy a dedicated GPS. My GPS it has worked from the start and with each firmware just got better.
[Galaxy S I9000 General] sjdean:
I think this information is wrong.

Changes your LBS Settings through *#147... to some really odd values, just change everything. Delete secgps.conf and reboot. You get a new secgps.conf with normal values right?

Go back into LBS Settings, you'll see your old info.

Secgps.conf just seems to be an export and doesn't seem to have any bearing on the actual GPS settings.

I've noted the following at least in SECGPS.CONF

SSL is 0 when ACTIVATED, 1 when DEACTIVATED

SESSION TYPE = 1 for Tracking, 0 for Singleshot

ENABLE_XTRA = false when GPS Plus is OFF, true when ON

SKYHOOK has no bearing on secgps.conf

AGPS_MODE = 1 for Control Plane, 0 for supl

What I don't know, is what the following are:

SSL_TYPE=0

POSITION_MODE=7

SERVER_MODE=1

ENABLE_NMEA=false

ADDRESS_MODE=1

TIME_BTW_FIX=0

USE_DEFAULT=true

NUM_OF_FIX=0

More to the point, why is ENABLE_NMEA disabled?
[Galaxy S I9000 General] Jreitnauer7:
Has anyone actually tried jf7? From the original poster it seems to be better. I am currently on on JF6 and its horrible. I'm interested in trying jf7 but with new to android I'm jot sure if I'm ready to change the firmware yet.
[Galaxy S I9000 General] exitido:
ITS A ****!!!!

Only 2 satellites at view in 10 minutes, and 0 i use!

WTF!?!¿!¿

This is the worse firmware of all.