Related
Each time I flash new ROM, I go test GPS performance with GPS Test to see whether something changed.
What I'm interested in is primarily lock on speed, and also how solid the lock to satellites is, but that's secondary. (since froyo, the locks seem pretty solid, no more sudden drops like in eclair)
What I noticed is that even with same firmware this varies quite a lot, even when I try to make the test conditions vary as little as possible (I always test it from the same spot and hold it the same way to ensure similar signal propagation. I can't control the weather, but as it's winter, it usually overcast).
So my question is, do you find you lock on speed varies a lot with same firmware and in same conditions?
Mine can vary from a few seconds (rarely) to losing the patience after few minutes of waiting for the lock! (more often)
Is this normal or am I having some weird issues?
Because if this kind of huge variation is normal, then all my testing is pointless!
Same thing here, but used to me more "consistent" with original rom (2.1 from Bell canada, can't remember wich one). Now on jl2 it takes longer to get a fix and weather seems to impact more.
same problem...
gps works extremely unconsistant.
me and my girlfriend have same phone with same firmware and 99% same apps installed. if we put the phones next to each other the gps signal is sometimes the same somethimes really different. we tried to find out how this could be but didnt find any difference. some days ago i turned my gps on as we were at the city together and it took really long to get the location. and then looke dat google latitude and holy **** my girlfriend got the cirrect position there even without taking it out the pocket and her gps was turned off lol. thats a bit scary sometimes.
now i installed gps tracker booster to stay at the same location if im indoor. otherwise it jumps from one location to another all the times and latitude says ive driven 4000km in a day just because i was at home and walked from fridge to the toilet...
I wonder if it has anything to do with hardware antenna issues. There was a thread here somewhere. It might be, and yet it might not be. I'd like to be able to check if I have this hardware issue before risking my phone and surely voding the warranty.
It does seem to be somewhat software dependent, but that isn't enough. Inconsistency proves nothing
I could also swear it's getting worse with the time. In 2.1 I used to be able to get a lock in half a minute or so in the worst case (even if it wasn't solid). In 2.2 it was better but in 2.2.1 versions it was all over the place. Usually amazing just after installing the ROM, but then going downhill. So maybe it's just worsening with time or oscillating with ROMs. I'd need days of flashing and testing to get it sorted out - possibly.
Total confusion... In the end I'll just buy a dedicated GPS with a big antenna. Exactly what I wanted to avoid by getting the Galaxy.
Well, i did a lot of testing with my Galaxy S.
The only conclusion i got is that different roms impact the time the Gps takes to aquire lock.
I also concluded that is due to GPS hardware keeps losing the sinal makes you apear in places which in reality you're not or showing that you are going across a road when you are stopped.
In this case A-GPS diminuishes your acurracy.
t1mman said:
Same thing here, but used to me more "consistent" with original rom (2.1 from Bell canada, can't remember wich one). Now on jl2 it takes longer to get a fix and weather seems to impact more.
Click to expand...
Click to collapse
I got slow fixes with JL2 too. But I am now testing "MS based" which improves lock time a lot (less than 20 seconds). I need more testing to make sure that my device is still accurate however.
bluecluster said:
Usually amazing just after installing the ROM, but then going downhill. So maybe it's just worsening with time or oscillating with ROMs.
Click to expand...
Click to collapse
Exact issue here... Lately I thought that I have some kind of bad habits due to installing new roms. But now i see, that I'm not the only one with this.
nalu_pl said:
Exact issue here... Lately I thought that I have some kind of bad habits due to installing new roms. But now i see, that I'm not the only one with this.
Click to expand...
Click to collapse
I had a "new" issue one time where it got all over the place so I deleted the data and redownloaded it (with GPS Status) and it fixed it. Might be that it keeps old data instead of refreshing it.
But it's not related to the time to fix
Hi all, i'm dealing with HD2 android nand installation since 3 days.
I've been able to have everything working like a charm except the gps... that damn thing doesn't want to work in any way.
It works correctly in winmo6.5, i tried copilot and the internal gps tool started seeing satellites each by each to end getting a fix in around 1 minute. Absolutely acceptable!
Android is a whole different story.
Gingerbread:
MDJs 2.5/2.6 it doesn't work. Tried changing libs manually, renaming, chmodding, fasterfix, changing the radios 3 times (2.15/2.14/2.12).. no way!
Froyo:
Installed a CleanDroid rom (basically a CM6.1 clean build), launched gps status and no go... wait! linked! from 0 to 6 satellites linked! is that normal?
Well, i was happy anyway... finished congifuring the rom, went out, tried again with Gmaps... searching... 5 minutes... 10 minutes... gps status says no signal.
Reboot, gps status, no signal.
Powered off the gps then on again, gps status fix in 1 minute (again, from zero to 6 satellites suddenly). Then i'm trying again now and it still acts strangely.
No go for 15 minutes, then it fixed (7 sats). Exit from GPS status, waiting 3 seconds, opening it again, 15 minutes, no fix... same exact position!
It's, in a single word, frustrating.
Currently i'm on Cleandroid Froyo rom, radio 2.15.50.04 (it came with stock HTC WM6 rom), magldr 1.2. All roms installed through CWM.
Any hint that could help me solving the only problem i get with this puppy?
Cheers.
Edit: forgot to say that i don't know if AGPS date are working correctly in GPS status, every time i try to download them it says "AGSP data will be downloaded as soon as there will be internet connection" (or something like that). It goes by it self that internet connection is alway up and running (3G or WIFI).
Updates: tried with miui and desire rom, same behaviour.
Reinstalled WINMO6.5 and tried a littlebit, it gets a fix in 1 to 2 minutes but i can see the satellites in the tool. After fix it keeps the connection.
Anyone of you can please let me know how is GPS status acting on your HD2s?
I've a nexus one too and GPS status starts showing stallites slowly, one by one untill it get a fix. The few times i got a fix on the HD2 it was suddenly, no satellites where showing before. Is it acting the same on your HD2s? I'm becmoing mad 'casue by the blueprints both HD2 and Nexus should have the same chipsets and the nexus is really really fast in getting the signal (with or without agps).
Another thing, since my HD2 is brand new (it came back from HTC for repair the 4th of jan) may it use a different GPS module? Is there any way i can check it?
Cheers.
Works fine with me,
MDJ 2.5 CM7
2.12.50 Radio
Fasterfix set to Netherlands. AGPS downloaded via GPS-Status.
Get a pretty quick fix, about 2 minutes.
Didn't change any lib, since it should work out of the box with MDJ 2.5.
Also, the first time a fix will take some time longer, so just wait till you get a fix.
Eelkede said:
Works fine with me,
MDJ 2.5 CM7
2.12.50 Radio
Fasterfix set to Netherlands. AGPS downloaded via GPS-Status.
Get a pretty quick fix, about 2 minutes.
Didn't change any lib, since it should work out of the box with MDJ 2.5.
Also, the first time a fix will take some time longer, so just wait till you get a fix.
Click to expand...
Click to collapse
Thanks but i already waited very long... 15 minutes on a balcony in the middle of an open street is too much, i didn't get a single satellite showing in this time!
The nexus gets the signal in 2 minutes without AGPS and after erasing GPS data. It also starts showing satellites after 15 seconds at worst.
The 2 uses the same rom (cm6.1 froyo) and same tools, tests were made side by side.
By the way, could you please help with my other question? Does your GPS status show satellites slowly or suddenly?
Thanks.
I have no problem with 2 hd2s, 1 running mdj 2.6 and 1 is running desire hd.
Sent from my HD2 Droid HD using XDA App
There is definitley a problem with the GPS, I have pretty much the same experience as the OP, sometimes it fixes sometimes it doesn't. When it does fix it suddenly has 6-8 satellites after finding 0 for 10 minutes.
Also some other guys reported this behaviour, it doesn't show anything untill it gets a fix. I think this is due to libgps which is probably still in development.
At least i hope! Today i gave it another try, went out in the middle of nowhere and had a 15 minute walk in around 30sqmt with gps status open and leo on my hands.
No fix...
Hope some developer may look at this and help me out understand what's wrong with my unit. Also logs say everything is working correctly... but it doesn't.
Did you try to reflash the ROM?
Also I get a pretty sudden fix of satellites, it will scan, and suddenly comes up with 5 fixed satellites of 8, it was also pretty quick this time. Less than 1 minute!
i flashed like 10 roms, some of them twice...
Some good news! It seems that using WINMO + SD Rom it works every time, it's just someway slow in locking the position and it doesn't matter if i just got lock or not.
Used Cope's gingerbread rom, first got fix with winmo, then with phone in the same position switched to andorid ad got a lock in around 5 minutes with GPS status, then i switched to Maps and got another lock in around 2 minutes. Not exactly fast but it's working at least! I don't know if it will become better with usage, i'll keep you updated.
In the meantime who was stuck as i was could give it a try.
Cheers.
Hello wise xda guys.
Any ideas why my hd2 freezes after some time, when I use gps with osmand or maverick (or a couple of other software I tried before and unistall). It freezes completely, and I have to remove the battery. While it is working (before freezing) everything works fine.
[Another symptom (maybe irelevant) is the very slow gps fix (the first time), which deosn't really bothers me (I'm a patient person). I'm just writing it here because maybe there is a relation]
I use: Froyo 2.2.1, mod: Cleandroid 2.55, MAGLDR 1.13.
Otherwise the telephone is more or less stable
thnx
Same issue it seems...
Going to re-flash WinMo and test there.
I'm having the exact same issue lately and it is not funny/safe at all.
I first had it happening in google navigation all the time and now in iGO and Waze.
Can this be from Rafpigna's undervoltaged kernel or be a hardware issue?
Unfortunately the device freezes completely and doesn't give any error.
Does a log exist somewhere?
Any help is more than appreciated!
Yeap, still the same problem and I can't figure out why.
I've tried more than 10 different apps, but allways the same. After some time the phone freezes. I remove the battery, start the app and after a while, the same.
I tried working with battery only or with car charger only, still the same.
I removed and brought back all my apps with titanium backup, still the same.
I have a suspicion that when it stacks and after rebooting, if I leave it in peace (I mean don't do anything with the phone, just keep it without running any app), for some time (10-20 minutes), then it starts and keeps the gps app more time, than the time of the initial freezing. Maybe this is a symptom that could ring a bell to an experienced guy...
Anybody, any ideas?
I think mine is related to heat.
Left it in my pouch and placed iGO in demo on a long roadtrip. After 15 minutes the phone was warm and the screen was frozen so I had to get the batt out again.
More than frustrating since I have a 700km trip to do on Thursday.
Not sure about the heat
I had the same suspicion, that the heat was causing the freezing ) funny language ah?).
So I tested it while keeping it cool (I protect it from the sun and remove the car charger), but still the same happened. After some time it froze again. (the phone was cold)
I have a suspicion that a possible reason is the rendering of the maps. I've noticed that I have the problem, mainly when driving a car, where the maps images should change more often. I kept it in my pocket and made a few hours trekking, with no problems. Though in my pocket I had the app running in the background and I only open it a few times, just to add some points on the map.
Another sister thread
There is also this thread, by Crash-nl, with the same subject (more or less) so we can combine powers.
Check it out
http://forum.xda-developers.com/showthread.php?p=12391898
I'm also having GPS freezing issues, but probably way worse than you guys. I just got my phone from service center, but the issue still exists. I just quote my comments from an another topic:
I've now got back my HD2 from the service center. The GPS is now working, but not in Android. When I was using WinMo 6.5 with WWE 3.14 and 2.15.50.14, the GPS worked great. Fast lock, TomTom worked well and Google Maps worked fine. Then I decided to get Android again and after I installed everything, I discovered, that I had the same exact issue like prior the repair. The GPS starts looking the signal, if it doesn't find it, nothing bad happens, but when it does find the signal, it causes the phone to freeze. Instantly after the signal is found, it causes instant freeze. Screen stays on, nothing happens. What can cause this? I haven't yet tampered with the gps.conf settings, but I don't even think that it could fix the issue. I'm really going crazy with this.
Yeah, I'm thinking also its a driver issue. My current Android build is RAFDROID 4.0.2. And since this issue seems to be exatly the same, like before the repair, the GPS probably doesn't work in the earlier versions of RAFDROID. However something has changed in my phone, because the GPS has worked with nand Android builds in the past and even with RAFDROID 3.0. Now however, it doesn't matter which build I use, the issue always exists. Could it be caused because of the GPS module? I mean, does the WinMo 6.5 QuickGPS app save the AGPS data directly to the GPS module? So could there be some kind of corruption in the GPS module? I was having some sudden reboots, while using Google Maps and TomTom in the WinMo, but I was able to fix them, by hard resetting the device.
First time I started having this issue was, when I updated from RAFDROID 3.0 to 3.1. After that, the GPS has always caused instant freezing, when using GPS in the Android. Even downgrading back to 3.0, didn't solve the issue. Now I'm having this issue with all Android builds.
It's possible that my GPS module or "chip" could be somehow broken physically, but it's no point sending the device back for repair, because they send it back and say, "there's nothig wrong with the GPS". I'm really hoping it's not a hardware issue, because if it is, there's really nothing that can be done. I have still about a year left from the warranty and changing the module myself, will void the warranty. I just cannot understand why does the GPS still work in WinMo, but not in Android? Because if the module was somehow broken, should the GPS be defective also in WinMo?
I have tried flight mode, Wifi and 3G off etc. and the GPS DOES WORK. So the chip is not dead.
Just did some more testing on mine to try to find the issue.
I have always had a freez when I used google navigation with the sat image from the start in Android. But last week it happened in iGO and Waze which scared me a bit.
As a matter of test I installed WinMo again last night. Fantastic OS btw! and installed iGO.
Everything was up and running at 2am and I decided to let it do a demotrip of about a 1000km. The demo also sets the GPS receiver active.
I placed the HD2 it next to the fan of my laptop which is always on to generate some extra heat.
This morning at 10am the demo was still running perfectly.
Just reinstalled Android on it again. After 3km's in iGO 'gps signal lost' . I cannot get it back in any way. The GPS symbol is stuck in the bar above even if you disable GPS in the settings. So reboot is the only way.
This is getting very frustrating for me since my phone needs to work as GPS and may not fail.
Also a funny one is that it doesn't seem to matter on mine if the gps.conf file is on there or not ;-) lock time when the hd2 works is approx 1min
lukesan said:
Just reinstalled Android on it again. After 3km's in iGO 'gps signal lost' . I cannot get it back in any way. The GPS symbol is stuck in the bar above even if you disable GPS in the settings. So reboot is the only way.
This is getting very frustrating for me since my phone needs to work as GPS and may not fail.
Click to expand...
Click to collapse
I'm having this same exact issue! However I just discovered that the local service center did not change the GPS module or antenna. So this might be the reason why my GPS doesn't work. The service center was fooled that the GPS works, because they didn't test the GPS thoroughly. YOU HAVE TO ENABLE FLIGHT MODE OR TAKE THE SIM CARD AWAY TO TEST THE GPS!. If you don't do this, you are being fooled believing, that your GPS is working, but it's not.
You guys should test your GPS, by going back to WinMo 6.5 and leave your sim card away from the phone. If your GPS can find the signal even without the sim card, congrats, your GPS is working. If you want to be double sure, enable flight mode and try again. If your GPS cannot find signal, your GPS module and/or antenna is broken and needs to be replaced.
Well my module is working.
Easy way to test it and no need to take out your sim or so.
Just use the cab file attached to this post. If you will start it the first time it will scan the ports so you can end up with a small error in regards to BT but it not a real error.
The tool will continue to com port 4 where the gps mod is active on.
Go stand outside and voila, mine starts to show bars like it should be.
I'm taking a different approach now.
Ckeared everything and also took a fully fresh formated sd-card .... (as I type now not working)
lukesan said:
Well my module is working.
Easy way to test it and no need to take out your sim or so.
Just use the cab file attached to this post. If you will start it the first time it will scan the ports so you can end up with a small error in regards to BT but it not a real error.
The tool will continue to com port 4 where the gps mod is active on.
Go stand outside and voila, mine starts to show bars like it should be.
I'm taking a different approach now.
Ckeared everything and also took a fully fresh formated sd-card .... (as I type now not working)
Click to expand...
Click to collapse
Thanks! You just saved my time a lot! I downloaded and installed that app and I was able to get a succesfull GPS connection and now I can even get GPS lock, when flight mode enabled or sim card removed. This was impossible before installing this app.
However it seems that we are both suffering from the same issue. GPS does not work for me in Android. It has worked in the past, but nowadays, it doesn't matter, which Android build I use, it either freezes the phone and only way to fix this, is by removing the battery or it doesn't find the signal at all. Sometimes the GPS stays on, even if I turn it off. The blinking GPS icon goes away only by restarting the device.
If you are using gps navigation software on sd card, try format micro sd card with FAT32 and DEFAULT ALLOCATION SIZE option, do not choose allocation size such as 32,64 or any other except DEFAULT.
Try it and GL.
colosos said:
If you are using gps navigation software on sd card, try format micro sd card with FAT32 and DEFAULT ALLOCATION SIZE option, do not choose allocation size such as 32,64 or any other except DEFAULT.
Try it and GL.
Click to expand...
Click to collapse
Did anyone try this method? Looking at other threads I see people saying that only a warranty repair will fix the issue.
freezes
Hi. I had the same problem, i try everything formating sd, different builds and kernels. I disable "use wireless networks" and GPS work with no freeze.
Do you have a freezes on games?
did any one found the answer ?
is it a hardware problem ?
or a software ?
Thought I'd throw in that I'm having the same problem running hyperdroid rom on a telstra hd2. GPS finds a lock, works for about 2 mins then freezes requiring battery to be taken out to restart. I'm leaning away from a hardware issue as copilot worked perfectly on the same phone when I was running windows 6.5...
Just an update, after installing the new GPS fix from this link http://forum.xda-developers.com/showthread.php?t=1100114
[28.May.2011][Dev] GPS Libraries v1.0 for HD2 Gingerbread the GPS freezing problem is fixed. Full credit to the developer
Sent from my GT-P1000 using XDA Premium App
But the problem still occurs when using Google maps, Google navigation is now fixed
Sent from my GT-P1000 using XDA Premium App
Hi all,
I'm facing the same issue reported in post #12. I'm actually using latest Rafdroid HD (Froyo Sense) build on SD. Do you think I can try the fix in post 18, also if it is for Gingerbread builds? Please advise.
Thank you.
Hello all,
I have tried searching this forum and have found various similar threads but none quite the same.
I used to use the gps on my hd2 quite a lot, both in windows mobile running copilot, and in android with google maps. But recently, I can no longer use it. If i open google maps or navigation i will get anywhere between 2 seconds and 2 minutes and then the phone will freeze completely, even if i dont use anything just having the program running is enough. I installed gvSIG mini maps and that does not work well either, it either freezes or simply never returns any search results.
The thing that is making me feel it is possibly hardware related is that it worked perfectly for a long time, the phone is about 18 months old now. I have tried various roms (the one i am using just now is Android 2.3.4 - HyperDroid-CM7-v2.1.0-HeadyHoneybadger) and it makes no difference; with the exception of the gps/maps the phone is very stable and I am perfectly happy with it. I have tried using setcpu to lower the processor speed in case this was being caused by heat, but no difference. I am considernig reinstalling a Windows Mobile build and testing the gps from there.
Any thoughts?
Regards
Stuart
quite probably just an android issue, go back to winmo6.5 and see if it does it then, if it does hardware if it doesnt you know its android
I would agree with what Richy99 said to go back to Windows 6.5 and check. I am currently on the same Pongster build you are on and do not experience any freezing of the phone you describe. In fact, I am using an optimized gps.conf file for my area and get locks in 2-20 seconds from a cold start now and used the gps navigation for hours while traveling without issues. I suspect it is something hardware related.
Thanks for the responses.
So, I reinstalled Windows Mobile 6.5 downloaded from the HTC website. Clean install, opened google maps, seemed ok for a few minutes, then i went into the menu and ticked 'Use GPS', then it worked maybe a minute and froze up completely and the phone restarted. tried this about half a dozen times got maximum a minute use each time.
Given that the phone is always pretty stable except when trying to use gps/maps, I would guess that the hardware fault lies in that part of the phone. How long as HTC warranties? The phone is 16 months old now so it doesnt look good but never mine
Will contact HTC on the off chance anyway!
Cheers
Stuart
Small update, contacted O2 and they gave me a freepost address to send it back to for repair (a company called A NOVO i think it was), about a week later I got it back, they enclosed a letter saying that they have replaced the main circuit board inside the phone. So, same old case, scratches and all, but its like a new phone, new IMEI number and everything, normal service resumed! Full marks to O2 customer service and the repair company.
Richy99 said:
quite probably just an android issue, go back to winmo6.5 and see if it does it then, if it does hardware if it doesnt you know its android
Click to expand...
Click to collapse
prob 70-80% of HD2 Android users getting this freeze problem.
this is reply i just sent to another thread....:
http://forum.xda-developers.com/showthread.php?t=1088693&page=3
Well, I been having the freeze issues with namd forever, with every build, every sd card etc....especially if i turn gps or data on or both.
So, for last 36 hours, i thought i'd do a lil simple test.
Downloaded win mobile stock ROM......36 hours stressing the heck outta my phone, toggling everything on and off etc. guess what...NO FREEZE.
So, in my opinion, 100% NOT hardware, definitely Android hd2 related.
Matt
i picked up a focus 1.3 for my wife for a replacement because she broke her phone. i cannot get the gps to work. would not work on 7720, i forced update to 8107, still would not work. just installed the clean rom 2.0 (8773) and still will not work with maps, nokia drive or garmin street pilot.
i can't figure out why it's not working, but my wife really needs gps. are there any fixes?
svtfmook said:
i picked up a focus 1.3 for my wife for a replacement because she broke her phone. i cannot get the gps to work. would not work on 7720, i forced update to 8107, still would not work. just installed the clean rom 2.0 (8773) and still will not work with maps, nokia drive or garmin street pilot.
i can't figure out why it's not working, but my wife really needs gps. are there any fixes?
Click to expand...
Click to collapse
Try GPSInfo. I used to recommend GPS App (has Bing location), but now that is paid. GPSInfo gives you info about:
- GPS State
- Mode
- Accuracy (H/V)
- Course
If GPS State doesn't state "GPS Started", you have a HW problem.
EnderPsp said:
Try GPSInfo. I used to recommend GPS App (has Bing location), but now that is paid. GPSInfo gives you info about:
- GPS State
- Mode
- Accuracy (H/V)
- Course
If GPS State doesn't state "GPS Started", you have a HW problem.
Click to expand...
Click to collapse
it states started, but it's only using a-gps for location. which will not allow me to use on any navigation apps.
svtfmook said:
it states started, but it's only using a-gps for location. which will not allow me to use on any navigation apps.
Click to expand...
Click to collapse
It should say "Full GPS mode, satellites data" when fully working.
Make sure you turn off ALL data connections, you waited at least 10 minutes under a clouded sky and you are not in (or very near to a building) You do need to see the sky to get satellites.
If after 10-15 minutes under a clear sky you still see "A-GPS Mode" your hw may be affected
LE: A possible cause I can think of would be wrong drivers/firmware issue. As a possible way to fix that you can try flashing a stock rom or a custom rom. Normally I caution people away from custom roms as I've seen several "stuck at boot/samsung logo" through out the forum, all tied to custom roms. A stock rom is the firmware meant for your phone and even if you start from scratch at least you know it's the right thing for your phone. If you want to try that, see the post in my signature.
even with the 7720 update through zune, i had this issue.
i did revert back to stock, turn location off, then did the updates. all the way to 8773, and the gps would lock after a few minutes outside.
however, while driving, with the garmin app, all of a sudden my "vehicle" went shooting about a 100 yards off the road, then it never was right the rest of the trip.
so the gps seems to just be working intermittently, or whenever it feels like it..
svtfmook said:
even with the 7720 update through zune, i had this issue.
i did revert back to stock, turn location off, then did the updates. all the way to 8773, and the gps would lock after a few minutes outside.
however, while driving, with the garmin app, all of a sudden my "vehicle" went shooting about a 100 yards off the road, then it never was right the rest of the trip.
so the gps seems to just be working intermittently, or whenever it feels like it..
Click to expand...
Click to collapse
Considering 8773 (Tango) was not yet officially released/tested for Focus, I need to ask: is your phone a Focus (i917)? If so, it might explain some if the issues you're having. I would suggest staying with stock 8107 for the moment, but ultimately it is your choice. Also, make sure the phone's drivers are updated properly, 'cause if they don't, what you're going to get is issues...
like i said though, it was the same deal from 7720 on up with the updates from zune. i'm going to try to to revert back to 7720 and install the samsung drivers for mango cab that i have.
GPS
Had similar GPS problems on Focus 1.3, tried different ROMs, etc. Only decent fixes I've found are pulling the battery out for ~30 minutes and turning on find my phone in settings. Not sure why battery thing works, but have seen the same suggestion for a lot of other phones.
Problem is my fixes have been temporary; GPS works for a while, then gets flaky again in a few days, even after reflashing.
Other Samsung phones that came out around the same time as orig Focus w/ similar HW specs had people tearing their hair out with GPS problems (Captivate, Galaxy S). Unfortunately, general consensus in Captivate forum seems to be problem is 75% hardware. Those guys tried endless SW / OS tweaks; some helped a little. Unlocked mine to try to find similar tweaks, but haven't solved the problem yet