My LG QUANTM MODEL C900B only track by WIFI or by CELL TOWER TRIANGULATION.. It appears that my phone dont detect GPS signal because it use only those two metods.
My phone is new and I have tried a lot of things, I reflash the phone, turn off the Location and then turn it on, RESET but the phone only detect my position by WIFI and cell tower traingulation.
This particular model is AGPS only or my unit is defective? The phone detect my position but it cannot track my movements because for that it need the real gps signal from the sattelite.
I don't know anything about anything so I have to ask...is there a setting on the device that allows you to enable your location? And if so, do you have it enabled? On my older winmo device there were to places to enable my location...one is for weather, the other is in system settings/location
Yess the problem I got is that my phone only takes cordinates from A-GPS and not from GPS. I can see where I am but it did not detect any GPS satellite. And yess everything is on. Location Services are on
Try this... Use a map app that would usually use GPS... When it triangulates near your position, but not actually your position, leave the phone for a long time and it should work...
If this works, then each time you use it it should be much quicker...
My phone only triangulates positions and can't use the gps satelites, maybe the gps radio is bad,something I doubt because the phone works flowessly exept the gps radio. I will try to reflash reflash the phone with the original firmware ti try to correct the problem.
ASPTHEONE said:
My phone only triangulates positions and can't use the gps satelites, maybe the gps radio is bad,something I doubt because the phone works flowessly exept the gps radio. I will try to reflash reflash the phone with the original firmware ti try to correct the problem.
Click to expand...
Click to collapse
Try using the GPSInfo app. Let is sit under open sky conditions for more than 15 min. The first time a GPS gets a lock can take quite a while.
Related
My Touch Pro ran TomTom flawlessly until a couple of months ago when I got a problem with the GPS device (not the signal) being lost every few seconds. It would reappear again for about 5 secs then off again. Despite soft resets etc, I suspected it might be the SD card at first as I tried many restart combinations with the card in/out etc and as it seemed to help on one occasion I put it down to that. But it did happen on a regular basis.
I now have the X1 with its superb GPS implementation, I was very impressed for a few days... until you guessed it, this problem started happening again!
Luckily I remembered the only setting I had done prior to this occuring was to use the Advanced Config application, where I enabled the AGPS feature. So... I went back in and disabled it and the problem disappeared immediately. I used Advanced Config on the Touch too, so that must have been the problem for sure.
I notice that AGPS is disabled by default. Why HTC did this must mean there is a problem with this feature.
So be advised, not to use the AGPS unless anyone knows good reason to and has a fix for the problem I mentioned.
I ran into the same problem. Turned on agps in advance config, used tomtom 7 and keep getting drop signal. It would pick up the sat signal for a few second and lose it, what interesting though when I use google map it would track me fine, no lost of signal. I can see my "dot" on google map moving along. When I drive, haven't tried it with other nav software to see if this was an issue. I still wonder why they have agps turned off though as default.
i think even if its set to "disabled", its enabled. a-gps must be hard coded in the hardware itself!
ps: i have the same problems when its "enabled".
I think it's the AGPS file that might have corrupted. You can solve this by re-download AGPS file and everything will be fine.
It happened to me once or twice, but it's not a reocurring problem so I did not bother much.
which agps file?
Guess you talk about an A-GPS setting in Tom Tom?
I cannot follow your conversation. With Mobile Navigator, which has no switch to enable or disable A-GPS it works pretty fine.
Sat-fix within seconds - thanks to the provided A-GPS function of the X1, which I don't think can be disabled on teh X1, until you don't update the information frequently with the Quick-GPS application.
Maybe Tom Tom can't interpret the A-GPS information?
How long does a Sat-Fix in Tom Tom take, when you disable A-GPS (in Tom Tom)?
Eric
we are talking about a tool called "advanced config tool". there is an option of enabling and disabling a-gps. "disabled" works best for most users...
you can have a 3d fix in seconds also with no a-gps.
Eric X1 said:
I cannot follow your conversation. With Mobile Navigator, which has no switch to enable or disable A-GPS it works pretty fine.
Sat-fix within seconds - thanks to the provided A-GPS function of the X1, which I don't think can be disabled on teh X1, until you don't update the information frequently with the Quick-GPS application.
Maybe Tom Tom can't interpret the A-GPS information?
How long does a Sat-Fix in Tom Tom take, when you disable A-GPS (in Tom Tom)?
Eric
Click to expand...
Click to collapse
It's incredibly quick (even indoors) to fix a position without AGPS. I admit I haven't knowingly had any noticable problems outside of TomTom but this is something I use a lot. It copes admirably inside, in built-up or shaded areas. No real need for AGPS then! I did try updating my QuickGPS file by the way, to no avail. Disabling was the only fix!
The FIX IS TOO FAST!!!
But I don't have this problem.......
DocMAX said:
we are talking about a tool called "advanced config tool". there is an option of enabling and disabling a-gps. "disabled" works best for most users...
you can have a 3d fix in seconds also with no a-gps.
Click to expand...
Click to collapse
My X1i doesnt have an "adavanced configuration tool" application. Is this a 3rd party addon that you have installed, or is my device just configured differently?
DocMAX said:
which agps file?
Click to expand...
Click to collapse
xtra.bin in \Windows directory I believe
one way to verify if the problem is due to the AGPS corrupted file, is if you encounter the problem, delete the xtra.bin and see if the problem goes away.
kiwiandy said:
My X1i doesnt have an "adavanced configuration tool" application. Is this a 3rd party addon that you have installed, or is my device just configured differently?
Click to expand...
Click to collapse
you have to download it http://forum.xda-developers.com/showthread.php?t=317070
it's our swiss army knife, but be careful
I think people may be getting confused between a-gps and what quickgps does.
My take on this is:
QuickGps downloads a file which contains a list of satellites to speed up getting a signal. Works very well on the x1
this is governed by HKLM/Software/HTC/QuickGPS
A-gps gets an approximate location from your cell tower and feeds 6 virtual satellites signals through the com port set up in the control panel.
It constantly does this, using memory-map software you can see that the signal drops and comes back every second or so. it seems to overwrite what is actually coming from the gps chip as I've seen 4 high quality satellite signals disappear to be replaced with 6 from the a-gps nowhere near where I was.
There's a setting in the registry section concerning A-gps which has "GPSmode" which is set to 2 I wonder what the other values are and do, I havent played with those yet.
You can change the refresh interval I set mine to be 5 when on foot
HKLM/Software/HTC/SUPL_AGPS
I agree with pretty much what you have said (the difference between Quick GPS [sometimes also known as Assisted/A-GPS] and the conventional, location-based AGPS)
However, I don't believe, unless somebody scientifically, or empirically prove, that the phone will receive virtual satellite feed/signal once it acquire the proximity based on the LBS signal. Because to do that, you need to have a data carrier, and it's either via GPRS/UMTS data connectivity (not possible since I would have noticed the data transmission), or radio frequency that satellites transmit on. It can't be GSM/W-CDMA since they operate on the different frequency as GPS, or if it indeed transmit the "virtual satellite signal" on the GSM/W-CDMA network, then I'm sure you will notice it as part of your monthly telco billing?
You may argue that the server is transmitting the virtual satellite signal on the GPS radio frequency, if so, that'll be new development in the AGPS technology since HP iPAQ 6515 first come out employ. However, there are few consideration point;
1. GPS radio frequency does not operate well across barriers, which means the 'virtual satellite transmitter' must be transmitting at a higher ground otherwise it won't work
2. The GPS receiver must be able to reconcile signal from virtual satellite signal and 'real' satellite signal, which means added layer of processing at the phone end, which in my opinions offer more complexity than effective solution.
That said, I just read that the Quick GPS service provider supports 50bit navigation raw data streaming, so I might be wrong afterall.
fards said:
I think people may be getting confused between a-gps and what quickgps does.
My take on this is:
QuickGps downloads a file which contains a list of satellites to speed up getting a signal. Works very well on the x1
this is governed by HKLM/Software/HTC/QuickGPS
A-gps gets an approximate location from your cell tower and feeds 6 virtual satellites signals through the com port set up in the control panel.
It constantly does this, using memory-map software you can see that the signal drops and comes back every second or so. it seems to overwrite what is actually coming from the gps chip as I've seen 4 high quality satellite signals disappear to be replaced with 6 from the a-gps nowhere near where I was.
There's a setting in the registry section concerning A-gps which has "GPSmode" which is set to 2 I wonder what the other values are and do, I havent played with those yet.
You can change the refresh interval I set mine to be 5 when on foot
HKLM/Software/HTC/SUPL_AGPS
Click to expand...
Click to collapse
zenkinz said:
I agree with pretty much what you have said (the difference between Quick GPS [sometimes also known as Assisted/A-GPS] and the conventional, location-based AGPS)
However, I don't believe, unless somebody scientifically, or empirically prove, that the phone will receive virtual satellite feed/signal once it acquire the proximity based on the LBS signal. Because to do that, you need to have a data carrier, and it's either via GPRS/UMTS data connectivity (not possible since I would have noticed the data transmission)
Click to expand...
Click to collapse
when you enable a-gps in the registry it establishes a data connection, or at least it does on my phone.
In my house I get a variable signal, it can drop the data connection easily (and does)!
When I first tried A-gps enabled in the registry it tried to connect, couldnt and memory-map reported no signal. It then connected I got 6 satellites listed till the data connection dropped. This makes me think it's using a data connection.
I disabled all data connections using paul modacos "nodata" and didn't get any "satellites" picked up. My quickgps was upto date at the time and outside I would expect to get a decent "proper" satellite lock.
the SUPL-AGPS section of the registry also contains the following.
Server IP 10.1.101.63
Server Port 7275
Which suggests some form of data connection. Remember this has nothing to do with quickgps or the ephemeris data that gets.
Have a look at http://wmexperts.com/articles/gps_vs_agps_a_quick_tutorial.html
&
http://en.wikipedia.org/wiki/GPS_Phone
A typical A-GPS-enabled cell phone will use a data connection (internet, or other) to contact the assistance server.
Click to expand...
Click to collapse
-----------------------
edit Have just tried again to confirm what I wrote and not getting anything through a-gps at all! I wonder if there's something in this custom rom that's changed things.
But I am being told Ive got a HDop of 666.6m which is a bit spooky..
step outside and I got 9 satellites with 8m hdop back inside and I'm getting standard fix 5 sats 2m HDop flashing on and off every second (signal/no signal) but no data connection being used, so it looks like I'm wrong, so I'll take it all back!
Need to work out what's going on now..
I was having this same issue. At least its good that its not just my device. I tried deleting xtra.bin from both \windows and \temp and it did not help.
Just some clarification on QuickGPS and AGPS. For a regular stand alone GPS to connect, when it first finds a satellite it must download ephemeris data. The ephemeris data contains info about where all the GPS sats currently are in the sky. The ephemeris data is broadcasted by every satellite periodically. A regular GPS must wait for the beginning of the next transmission. If signal is lost mid transmission, the GPS reciever must wait for the next transmission and start all over again. Only once this data is downloaded can a lock begin to be calculated. What quickGPS does is download the ephemeris data from the internet so that next time you request a gps lock, this sometimes lengthy process can be skipped. quickGPS downloads a file called packed ephemeris and places it I believe in the windows directory.
AGPS on the other hand simply supplements info from the sattellites with info from the cell network. What towers you are currently near gives an approximate location (the mechanism that google my location uses) which then tells you which satellites to look for. When fards said it feeds virtual satellite info, he doesn't mean it actually broadcasts fake satellites via RF. It just feeds extra info to the GPS driver. Also, there are lots of calculations to do to maintain a lock. Once the receiver is getting sattelite signals it can send this information over the internet to the AGPS server which is a much more powerful computer that can do these calculations much faster. The server calculates the lock for you then sends you your position information back over the internet. This is why apgs enables a data connection.
Hi
I wonder if someone has this same problem and know how to solve it...
Most of the times that i try to use tomtom or wayfinder, the gps can't get a fix, it locks on to the satelites with no problem, but only for 1/2 seconds, then loses the position and after some 10s it regains the position again for another 1/2s and loses it again...
The only i way can get the gps to function properly again is by turning the phone off, remove the battery and turn it back on. Then it works, but if i turn off tomtom and try to use wayfinder the problem returns, and sometimes also happens after i close tomtom and try to use it again later...
It's driving me nuts i did a hard reset and after instaling my programs the problem remains. It seems google maps works ok, tho i'm not sure as the program doesn't have the option to see to how many satelites it's locked on.
any ideas? I doubt it's from the programs i install cause the ones i use i dw them all from this forum...
Thanks
its probably your location, the satellites might not be abundant enough. GPS works fine for me, I'm using IGO8.
no, it's not that, cause when it happens i remove the battery and reinsert and turn on the phone again, and after doing that procedure the gps will lock with some 6/7 satellites and will not fail as long as i don't turn off the first program i try to use the gps with ...
If i use tomtom after doing that battery removal procedure, it will work flawlessly, if i turn off tomtom and use it right after, it still works ok, but, if i turn off tomtom and after i use wayfinder, or if i only use tomtom again after some hours, it will have that problem (and vice-versa), it does find the same satellites and gets the coordinates (in tomtom they get those blue level bars), but only for very brief moments every 10/15s which ofc makes it impossible to correctly use the navigation program
If the gps was broken or something it wouldn't work ok after i removed the battery... i guess i'll try another hard reset
Try to disable A-GPS.
possible corrupt quick gps file , run quick gps and downoad new file.
Hi,
If you have used Advanced Config and enabled A-GPS, disable it as it will cause issues with TomTom and other GPS navigation software.
Later...
hehe got it working now, i had tried that before, but seems i was using an older version of advanced config or something, i downloaded a new version, disabled a-gps and now the gps is working fine thanks for the help
Re elusivo
Elusivo, could post how you fixed your problem? Because I currently have the same problem, but no Idea how to fix it. You said something about using a new configuration with and old one? Can you please explain?
Search for the program 'Advanced Config' on the forum and install it and then run it. Go to the GPS section and if A-GPS is enabled disable it. A-GPS uses the phone masts to triangulate and get your position which causes havoc when you are trying to use the internal GPS
Thanks for that......Problem solved
hello
I do have the saame issue as you with my gps. I install Igo, tomtom, gps htc tools and gps skinner and it is always 20/30sec to get a fix but it loses it 1 sec after.
If I disable A-Gps, it will increase the time to fix satellites or is it just used for quiick gps to download ephemerids???.
I think we have to ask Customer support because it is unacceptable for such an ewxpensive phone to have to disable functionalities such as A-gps to get it to work
pyrofrag said:
If I disable A-Gps, it will increase the time to fix satellites or is it just used for quiick gps to download ephemerids???
Click to expand...
Click to collapse
A-GPS uses Cell Towers to guess where you are. It is not (on these phones anyway) linked to Quick GPS which is a lot better at getting you a fix on a cold start.
As others have mentioned for some reason with A-GPS enabled TomTom doesn't like it, and I don't know of any real reason to use it.
@artesea : I don't get why you said "I don't know of any real reason to use it".
Are you talking about Tomtom or about A-GPS function ??
Because if you are speaking about Tomtom, I do have similar problem with all software using GPS.
And if you disable A-GPS function you are going to have to wait may be 3 minutes or more to get a fix instead of 40seconds so I think this is a real reason to use it...
No I'm talking about A-GPS.
Have you tried a cold start using Quick GPS, I can get a location in under 30 seconds.
So I disable A-GPS and I got fix within 30/40 seconds and I never lost it.
I just think it is absolutely unbearable to have to disable A-GPS to get your GPS working properly. This mobile phone cost 700€
I just would like to know what is protocol version from people who can have A-GPS working properly.
Rom version : 1.02.933.3
Radio version : 52.43.25.24W
So you've gone from 20/30 seconds to get a fix but then it drops, to 30/40 seconds to get a fix and it work and you STILL have a problem???
Maybe there is a reason why A-GPS is disabled by default!
No when I disable A-GPS I don't have problem any more.
I just remembered that I may have enable A-GPS through Advanced Config.
Hard reset do not change this, I though it was a registry editor value but apparently it is more than that.
Anyway it is not Xperia X1 issue but Advanced Config compatibility with Xperia X1
having problems with gps now too :/ later it was working brilliant (fix in no time), but now, most of the time i dont even see any satellite...
but sometimes, especially after reset, it shows like 5-6 satellites, but cant get fix, after some time sats just disappear :X tried disabling/enabling a-gps, with/without quick gps file downloaded, still the same... and no answer anywhere...
i guess i'll have to use my warranty and get it serviced :/
edit: today reflashed radio one more time (as yesterday after like 5 radio flashes, i ended on the original version, not the newest one) and suddenly gps is working hope it lasts...
First off I'm just a bit confused on the whole GPS thing. I have all the tutorials and stuff but will the GPS actually work without the data plan? (aGPS).
I have..
Radio: 3.42.50 Bell Radio
ROM: NFS 1.12VZW
I cant seem to pick up any signal at all...
Any help would be appreciated. Thanks!
GPS will work with out data plan, but maps are loaded from internet most of the time..
also it *might* pull data, that you shouldnt be charged for, aGPS uses a tower to determin the GPS clock and basicaly jump starts your lock by a min or so. with out it, your phone would search for GPS signals and try to sync its time with it, befor lockign on to all 3.
with aGPS it only uses a tower and 2 others
Hi Guys,
Here is an excellent article covering gps vrs agps:
http://www.wmexperts.com/articles/gps_vs_agps_a_quick_tutorial.html
As spyderekz said, our Vogues are capable of "stand-alone" gps. Having said that, agps is more accurate.
I am an Airline pilot with Air Canada Jazz, I have tested my gps in the air (with the phone in airplane mode), and the gps was able to lock. GPS sattelites are all numbered, both TomTom and gps viewer (GPS viewer is included in NFSFAN's ROM) display GPS status pages. These pages show how many sattelites you are recieving, and their numbers. Our Aircraft FMS (flight management system) has a similiar page. Both my Vogue and the aircraft picked up the same sattelites (The airplane picked up more, then again, MUCH bigger antenna!!!).
I also live in BC, I have used TomTom driving many mountain passes with no cell phone reception and TT keeps ticking along nicely.
I should add I'm on the Bell network, and Bell has not locked any GPS functions unlike Verizon where users must jump through many hoops to get it working.
Quick question tankbusta, what network are you on?....nerermind, just noticed your Verizon. Have you tried the stock Verizon ROM, complete the agps fix, then flash to NFSFAN's ROM???
If you search the posts, you'll see NFSFAN recommends using your own carriers radio, and letting ALL customizations run when upgrading that radio. As long as Verizon has a 3.xxxx radio, you should be able to use the tutorial to get gps working.
No problem using TomTom.
hi i was wondering if anyone knows what is the 6digit epst code that you get from getspc for a htc touvh 6900???
It is "000000"
I am trying to figure out how to use my GPS functions better. GPS works fine in Google maps and navigation and all but the main problem I am having is when trying to geotag pictures. It always puts as located in what I guess is the location of the cell tower. I have tried GPS Status and as soon as it locks and I switch to the camera app it snaps back to the cell tower. Basically any program that does not specifically lock the GPS satellites will be using the wrong location.
So is there a way to either force the GPS to lock until I decide to unlock? Or better yet have the GPS stick the last known locked location?
Why is the Focus' gps so slow? I don't know what's wrong with my focus, I mean it just takes so long to get the coordinates of my location. I even have to go to a open sky area then wait for few minutes before it can successfully get my coordinates. Its just so annoying, this is a post ipad product, how come an ipad 1 can get my coordinates even inside the room without any difficulty?
Is this a hardware issue or just a firmware fix is due?
my focus gets a very quick lock about 90% of the time, every so often it will take a mintute or so to lock, but i've had this happen with pretty much every phone i've owned, so it seems about average to good for me...
the ipad1 (unless a 3g + wifi model) uses your network to locate you, which is why it's quite fast.
We have 2 Focuses, one AT&T and one Rogers. With both I get about the same time to get a fix, and that's slightly under a minute, in my location (several tall buildings near).
With what app do you check your GPS? I recommend GPS App
It's an AT&T. My ipad is a 3G+Wifi. It gets gps coordinates via gps chip and not A-gps. Most of the time the ipad gets coordinates very fast in span of 20-25 seconds, boom you know where you are in the map.
I am using the built in MAPS software to track my location. Does the software matters? I mean if the chip is really weak, what can the software do ?
jtphl said:
It's an AT&T. My ipad is a 3G+Wifi. It gets gps coordinates via gps chip and not A-gps. Most of the time the ipad gets coordinates very fast in span of 20-25 seconds, boom you know where you are in the map.
I am using the built in MAPS software to track my location. Does the software matters? I mean if the chip is really weak, what can the software do ?
Click to expand...
Click to collapse
Sometimes it does. To give you an example why: GPS without efemerides take several minutes to get a fix. GPS with efemerides take 20s to 1 min to get a fix. Efemerides are downloaded via software.
As for the app I found it to be good enough for testing the GPS part.
I can agree with you. Sometimes while driving if I take a different route than the one the phone provided for me, it will either fail to locate where I am for a few minutes or just fail completely.
I think it's time for a small update.
Is it just a minor driver issue? I hope so , otherwise, we have to live with it or change to another device.
jtphl said:
Is it just a minor driver issue? I hope so , otherwise, we have to live with it or change to another device.
Click to expand...
Click to collapse
Again, other people (including me) haven't experienced any issues.
In fact, it works great for me with Turn by Turn Navigation, even inside the car on the passenger seat (not near the windshield).
Try changing some GPS settings in the focus diagnosis app
Sent from my SGH-i917 using XDA Windows Phone 7 App
what are the settings in GPS I have to adjust to make it perform beyond expectations? Which specific diagnostic option I have to tweak?
Did the OP ever find a solution to this? I'm having some slow locks and the occasional non lock.
I know in the diagnostic app you can get to the GPS with*#1575# but I'm unsure of what data can possibly be changed.
I'm having the same issue on my Focus (Rogers). It never connects to sattelite and always uses aGPS. It's very annoying. I tried many different gps apps and get the same behavior - very innacurate. Garmin allways says "Can't connect to sattelite", gMaps always shows cell tower icon. My phone is unlocked using original Chevron method (not Chevron labs). I also tired to change settings in *#1575# and turn ON/OFF TLS and GLONASS but nothing helps. Should I try hard reset?
Ecstatic12 said:
I'm having the same issue on my Focus (Rogers). It never connects to sattelite and always uses aGPS. It's very annoying. I tried many different gps apps and get the same behavior - very innacurate. Garmin allways says "Can't connect to sattelite", gMaps always shows cell tower icon. My phone is unlocked using original Chevron method (not Chevron labs). I also tired to change settings in *#1575# and turn ON/OFF TLS and GLONASS but nothing helps. Should I try hard reset?
Click to expand...
Click to collapse
I did a hard reset last night and it seems to have cleared up. I also installed this app, have to click the link in the post, searching for it didnt work.http://www.wpcentral.com/new-samsung-high-fidelity-position-enhances-gps-modifies-settings
Not sure if it's a placebo or not, but it seems to be working better.
is Focus GPS native chip or just a-gps?
Coelho_rj said:
is Focus GPS native chip or just a-gps?
Click to expand...
Click to collapse
Assisted GPS, which includes standard GPS in Standalone mode, so it's better than any native GPS.
after my hard reset the GPS locked much quicker for about a week, then it started acting up again.
my new solution seems to be much easier than a hard reset. Just briefly switch to airplane mode then re-enable your data and open maps up again. Been working great for me.
Faster solution that's been working for me. Turn on and off location services. My phone never locks without this, which is sorely annoying.
I had this problem on 7392 rom. After updating to mango 7720 and 8107, I get fix in 3 to 7 seconds in my room Tested with gpsinfo, it's real satellite data, not agps. I have also installed high fidelity position settings app. Don't know if it's helping.
Sent from my SGH-i917. using Board Express