Develop Bugs

[Q] CM7 and Triangulation

Okay, to the point. I have recently began learning and modding the ba-jebus out of my phone and I have had one major problem. The GPS doesn't work. With my knowledge of triangulation and the hours of research I have done reading threads on here complaining about similar issues, I have figured that my phone isn't connecting to multiple towers at one time. When I used the stock ROM for the Inspire it worked just fine, but ever since I used CM7, LeeDroid, and even AR, the GPS has been whack. Y'all are probably thinking, "Why doesn't he just use satellite GPS tracking?" Well my answer is, "I don't want to waste money on something I don't absolutely need if I can just utilize a bit of math on my phone to find my position on this rock we call Earth." So, what I'm asking for, is how would I go about allowing my phone to connect to more than one tower at one time. Is it something to do with the build.prop, or my APN settings, or something further down in the radio flash?

Do you even have mobile location checked in settings-location. Also cell towers is not gps and what do you mean that GPS tracking cost money?
Sent from my HTC Desire using XDA Premium App

TheGhost1233 said:
Do you even have mobile location checked in settings-location. Also cell towers is not gps and what do you mean that GPS tracking cost money?
Sent from my HTC Desire using XDA Premium App
Click to expand...
Click to collapse
I do have "Use Wireless Networks" checked. You're right about the cell towers not being GPSs, but your phone can use the ping between three towers to determine its position between the three, allowing for a GPS type system. What I was referring to in my above post was that "Where I come from, to use a satellite guided tracking system, you must pay money."

I know how cell positioning works, but I don't think you can influence it as a user.
Also how do they make you pay for using gps?
Sent from my HTC Desire using XDA Premium App

TheGhost1233 said:
I know how cell positioning works, but I don't think you can influence it as a user.
Also how do they make you pay for using gps?
Sent from my HTC Desire using XDA Premium App
Click to expand...
Click to collapse
Agreed, how come you pay for satellite navigation? If you are referring to the navigation apps, many of them are for free: waze, google maps brut mod and many others.

I think he means he doesn't have gps on his plan. I remember that before you had to pay extra for that, but now I'm pretty sure it just comes with your phone so long as your phone has gps capabilities.
Sent from my PG06100 using XDA App

as far as i know you can just see the nearest cell tower by you
because everything is broadcasted and only the nearest responds
but i could be wrong
gps costs? its passive, why should it cost something?
do you mean a-gps?
maybe you take a look at "Gps-Status" nice app with a-gps download

I do use GPS-Status for the compass, and if satellite GPS is free now, then I will stop trying to use triangulation.
I just went outside and tried the satellite GPS, and it took a minute to find a satellite, but it works. Thanks guys, I really appreciate the help.

123 Best gps fix!!! Thanks Daryelv.. December 9th 2011

IM RUNNING CALKS latest and greatest btw... Most all fixes get a fast lock, or at least a lock after a reboot. The REAL test is:will it still get a lock after, lets say, 8hrs? This is the only "fix" that has truly passed that test... Try it, and you will agree I like to open gps status and get a lock on satelites before i use my gps too, if that makes any difference.
This zip, plus GPS status works the best. Wipe dalvik and cache then flash away....
Best way to check is use GPS to get first lock and directions.... if that's good, then try to do the same thing a few hours later BEFORE A REBOOT.... works like a charm.... I finally think this one works guys... check this out: http://forum.xda-developers.com/showpost.php?p=13140032&postcount=17953

What problem is this fixing?

I have been using GPS Status for a long time. I would do the same on my Epic...open GPS Status, let it lock then Maps and Telenav had much better and quicker lock. I wasn't aware of those area fixes though. Telenav has been flawless on this phone for me around L.A. but I will definitely see what they're about. Thanks
Sent from my SPH-D710 using xda premium

GPS
Bielinsk said:
What problem is this fixing?
Click to expand...
Click to collapse
A good number of unlucky people like me were experiencing SHAKY GPS.
This is fixing my gps not working at all... Sometimes it would work off of several reboots.Same for my gf's et4g. i was tempted to exchange it for another et4g. I've had my phone since day 1, and gps has never worked consistenly.. Now it works flawlessly! Thanks again Angeldeath!!

##GPSCLRX# + MSL will reset your gps, a lot less of a pain too if your having problems getting a fix.

i think the gps is very weak. i can never get a lock in my basement while my evos never had a problem. when im outside, my e4gt will get a lock eventually.
tried all kinda of fixes none work. though i think i must have borked it somehow. maybe a complete reformat will fix it but dont wanna do that any time soon

JohnCorleone said:
open GPS Status, let it lock then Maps and Telenav had much better and quicker lock.
Click to expand...
Click to collapse
Now, do I need to do this every time I need to use Maps or Telenav? Is there no slightly more permanent fix?

I got 10/10 locked inside within 3 meters. Very nice. Thanks
Sent from my SPH-D710 using xda premium

My stock gps locks prefect. But for location weather apps like fancy widget and minimalistic text show the wrong location. Will this help? Or does it only help with location locking? My maps and nav work prefect though
Sent from my SPH-D710 using xda premium

locoboi187 said:
My stock gps locks prefect. But for location weather apps like fancy widget and minimalistic text show the wrong location. Will this help? Or does it only help with location locking? My maps and nav work prefect though
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
If it ain't broke, don't fix it!

Anyone else try this to confirm a fix and do you need to be rooted?
Sent from my SSGSIIE4GTuvwxyz!.....Should I touch my nose or walk a straight line now?

ebuechler3 said:
i live in iowa so i used the US-Mid-East zip from this thread: http://forum.xda-developers.com/showthread.php?t=953630
Depending on where you live should determine which zip you should download. And if you travel all over the u.s., just use the north american zip.(i recommend using the zip for the actual area that you live in)... Next, flash from recovery, then install GPS Status & Toolbox from the market.Turn on gps, open up gps status & toolbox, and select menu/settings/Display & Tools.. Then check "Show time to Gps fix"...keep gps status & toolbox open till sats are fixed..DONE. NOW I get immediate locks!!!
Anytime you reboot or power off, you have to open GPS Status to fix sats... THANKYOU ANGELDEATH and Xenova FOR THIS WONDERFUL GPS FIX THAT ACTUALLY WORKS FOR OUR PHONES!!!
Click to expand...
Click to collapse
Another Iowa Native! Me 2, whereabouts?
Sent from my SPH-D710 using xda premium

Lol there's a Florida specific zip? I didn't know we were that ****ed.

this fix doesn't work
my phone was good until last week, now navigation never works, GPS takes 30-90 seconds to get a location within a few meters of me.
i've been trying everything, as many have been, and this fix only works for the first minute after using gps status. if i wait an hour and check maps again, i have to reset and re-download to get sats again and it still doesn't always work.
at this point i'm mildly convinced it's a hardware issue. unless a new driver is found, i'm going to try to get an exchange soon.
Edit:
Going back to square one (so far) has been a good fix - http://forum.xda-developers.com/showthread.php?t=1351761
Edit 2:
Nope, going back to pure stock works as temporary as flashing regional GPS sats or clearing GPS cache

pyrostic said:
Another Iowa Native! Me 2, whereabouts?
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
des moines

FINALLY!!!
elingreen said:
my phone was good until last week, now navigation never works, GPS takes 30-90 seconds to get a location within a few meters of me.
i've been trying everything, as many have been, and this fix only works for the first minute after using gps status. if i wait an hour and check maps again, i have to reset and re-download to get sats again and it still doesn't always work.
at this point i'm mildly convinced it's a hardware issue. unless a new driver is found, i'm going to try to get an exchange soon.
Edit:
Going back to square one (so far) has been a good fix - http://forum.xda-developers.com/showthread.php?t=1351761
Edit 2:
Nope, going back to pure stock works as temporary as flashing regional GPS sats or clearing GPS cache
Click to expand...
Click to collapse
i counted my chickens before they hatched, because i had the same problem as you. But look what i found here: http://forum.xda-developers.com/showthread.php?t=1100114&page=220
This gps.config below works for our phones and actually fixes OUR problem.. it doesnt require constant reboots or anything... i also use gps status and toolbox.... just replace your gps.conf using root explorer and you are good to go. its in the /etc folder... dont forget to take off the .txt before you replace the gps.conf

Awesome! beweather now gets a lock inside my house instead of constantly searching

Originally Posted by elingreen
my phone was good until last week, now navigation never works, GPS takes 30-90 seconds to get a location within a few meters of me.
i've been trying everything, as many have been, and this fix only works for the first minute after using gps status. if i wait an hour and check maps again, i have to reset and re-download to get sats again and it still doesn't always work.
at this point i'm mildly convinced it's a hardware issue. unless a new driver is found, i'm going to try to get an exchange soon.
Edit:
Going back to square one (so far) has been a good fix - http://forum.xda-developers.com/showthread.php?t=1351761
Edit 2:
Nope, going back to pure stock works as temporary as flashing regional GPS sats or clearing GPS cache
Click to expand...
Click to collapse
i counted my chickens before they hatched, because i had the same problem as you. But look what i found here: http://forum.xda-developers.com/showthread.php?t=1100114&page=220
This gps.config below works for our phones and actually fixes OUR problem.. it doesnt require constant reboots or anything... i also use gps status and toolbox.... just replace your gps.conf using root explorer and you are good to go. its in the /etc folder... dont forget to take off the .txt before you replace the gps.conf
Click to expand...
Click to collapse
Thanks! Im in the car and pulled up Google maps. My GPS didn't lock on. I used your file, rebooted and launched maps again. It locked on within seconds. Before the file change it wasn't locking while moving in the car even after a few minutes.
Sent from my Samsung Galaxy S II Epic 4G Touch

locoboi187 said:
My stock gps locks prefect. But for location weather apps like fancy widget and minimalistic text show the wrong location. Will this help? Or does it only help with location locking? My maps and nav work prefect though
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
Some of those weather apps use the network location, not gps, and some display the nearest weather reporting station instead of your exact location. It all depends where the apps get its information from.
Beautiful widgets reported Dudley as location, the town next to me, probably using that tower. Weather Bug reports popular bluff airport, 25 miles away.

Why is thw Xtra download flag disabled? What is Xtra download?
Sent from my SPH-D710 using Tapatalk

Using phone gps where there is no tmobile network.

Last friday i went somewhere there was no tmobile network at all. Not even att.
I tried to use my gps (navigation app) and it keep saying searching for satellite and keep saying that without doing anything. Map was also not working!!!
How can i use my gps on such place?
Sent from DARKSIDE

You try to pre map it in google maps first? I find that works.
Sent from my SGH-T989 using XDA

You need to use a map app that doesn't require data, and has pre downloaded maps already on phone.
Try Sygic from Google play, it is something along those lines

You have to anticipate being in an area with no service and pre cache it like another user said. Go to maps, settings, labs and check pre cache map area and cache your anticipated route

I put my phone on air plane mode and turn on gps(to try gps;here is full network) and i search some place and it keep saying searching.
Means didnt work on mine ;(
Sent from my SGH-T989 using xda premium

bikrame said:
I put my phone on air plane mode and turn on gps(to try gps;here is full network) and i search some place and it keep saying searching.
Means didnt work on mine ;(
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
I'm not sure what you're saying. If you're going to be using your phone as a gps in an area with no signal, you have to pre cache the area in an area with signal or wifi first. Then you can just rely on the GPS in that pre cached area.

Your GPS should be able to find satellites regardless of your lack of service. A good app to check on how your GPS is doing (# of satellites, accuracy, etc) is GPS Test. As for the maps, that question seems to have already been answered.

yoft1 said:
I'm not sure what you're saying. If you're going to be using your phone as a gps in an area with no signal, you have to pre cache the area in an area with signal or wifi first. Then you can just rely on the GPS in that pre cached area.
Click to expand...
Click to collapse
I got what you mean but what if i want to make new destination from somewhere there is no network?
Sent from my SGH-T989 using xda premium

bikrame said:
I got what you mean but what if i want to make new destination from somewhere there is no network?
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
You can't. If you want navigation you have to have data unless you pre cached it beforehand in an area with data.

Yes u can, but only using the method I posts above. ^^^

That's the same thing as I was saying. If you want navigation, you have to have data at some point. Whether it's to download an app or pre cache maps, you cannot start in an area with no data and no preparation and use navigation.

yoft1 said:
That's the same thing as I was saying. If you want navigation, you have to have data at some point. Whether it's to download an app or pre cache maps, you cannot start in an area with no data and no preparation and use navigation.
Click to expand...
Click to collapse
Not really, once u download the app and maps using wifi on initial setup of your phone, u don't need data to use sygic. It uses your phones GPS in combination with downloaded maps, no active data connection required. Its core function is entirely different from Google navigation app, which requires a live connection

icenight89 said:
Not really, once u download the app and maps using wifi on initial setup of your phone, u don't need data to use sygic. It uses your phones GPS in combination with downloaded maps, no active data connection required. Its core function is entirely different from Google navigation app, which requires a live connection
Click to expand...
Click to collapse
You obviously didn't read what I said.

icenight89 said:
Not really, once u download the app and maps using wifi on initial setup of your phone, u don't need data to use sygic. It uses your phones GPS in combination with downloaded maps, no active data connection required. Its core function is entirely different from Google navigation app, which requires a live connection
Click to expand...
Click to collapse
If he had access to data or wifi in the first place, he could have pre-cached the Google map. The point is, there is NO service now, and without any data at all there is nothing that can be done. Make sense, bud?
Sent from my SAMSUNG-SGH-T989 using XDA

GPS issues on Rogers note 2

Hi I have a data plan with Rogers so the a-gps should be picking location with maps or waze. I was driving this morning but the gps was searching the whole time. I was on 4g during this time. All 3 of the boxes under location services are checked.
Thanks for any ideas

Depends heavily on the position inside your car.
The closer to a window or the windscreen the better. Try holding it up to the drivers window for a few seconds and see if it locks on.
Even the best GPS isn't going to work if it's completely shielded from the satellites by the metal roof.

Restart GPS Navigation app or Restart phone helps.
Sent from my SGH-I317M using xda app-developers app

gotshoaib said:
Restart GPS Navigation app or Restart phone helps.
Sent from my SGH-I317M using xda app-developers app
Click to expand...
Click to collapse
Should not have to restart your phone every time you want to use navigation.
I am having the same issue.
The GPS icon won't even display in the info bar without a restart.
Do you think this is a hardware or software issue ??

I notice about once a day on average that the gps icon will show up in the status bar. Sometimes it's only for a second or two and sometimes it's there for a couple of minutes. One time I saw it and it just seemed to last forever (I didn't time it but I'd guess 15-30 minutes).
I've gotten messages a few times about apps not being able to access location services. I don't use maps very much but I had it open the other day and it just froze up on me. No message about gps but I didn't keep the app open very long after it was obvious it wasn't going to work.
I'm on rogers in Ottawa.
Edit: Just played around in maps/navigation and gps flat out doesn't work. It was using cell tower triangulation and searching for gps the whole time. I had to turn on wifi to get an accurate location.
Sent from my SGH-I317M using xda app-developers app

Anyone have a home made solution or is this a warranty issue?
Sent from my SGH-I317M using xda app-developers app

So, after I posted last night I went out side and checked my GPS. Sitting on the steps infront of my building I conected to GPS in google maps and navigation right away - it worked like a charm.
Then I noticed it said "4G" instead of LTE in the status bar. I live downtown surrounded by buildings and I drop to "4G' on my front steps like 90% of the time. So, I get up and walk down the block and my LTE kicks in. Low and behold, I lost GPS. It only happened briefly but I lost the signal during the switch. Then I read that the note 2 only has a-GPS and lacks regular GPS. I don't know a ton about this stuff but I did read that connecting to GPS can sometimes be an issue if you only have a-GPS and your connection sucks.
Hopefully this is something that can be fixed with a software update. Who knows, maybe this is why those of us with the I317/I317M are the last ones to get the OTA update. I'm gonna call rogers today and let them know about the issue and see what they say. I don't wanna go through the hassle of exchanging my phone if every handset has this issue right now.

Are you using the Perseus kernel? If so GPS does not seem to work correctly regardless of which location provider is used. I reverted to stock and my GPS works.

RazzBot said:
I don't wanna go through the hassle of exchanging my phone if every handset has this issue right now.
Click to expand...
Click to collapse
I am not sure if everyone is having this defect with their phone. I hear some phones lock instantly on gps signal even indoors. Can you let me know what Rogers tells you after you call. Would be appreciated. Thank you.
Sent from my SGH-I317M using xda app-developers app

You could try flashing this: http://forum.xda-developers.com/showthread.php?t=1442038

I'm assuming OP has already tried this?
https://play.google.com/store/apps/...wsMSwyLDEsImNvbS5lY2xpcHNpbS5ncHNzdGF0dXMyIl0.
My Rogers Note 2 has no problems with GPS at all. If you're all stock and have spotty connections, than it's your area. Tall buildings would probably hinder GPS fixes initially.

Rogers here unlocked . Telus network. Rooted and themed and modded. GPS works wonderfully.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

@Class said:
You could try flashing this: http://forum.xda-developers.com/showthread.php?t=1442038
Click to expand...
Click to collapse
@Class said:
Are you using the Perseus kernel? If so GPS does not seem to work correctly regardless of which location provider is used. I reverted to stock and my GPS works.
Click to expand...
Click to collapse
ThaiM said:
My Rogers Note 2 has no problems with GPS at all. If you're all stock and have spotty connections, than it's your area. Tall buildings would probably hinder GPS fixes initially.
Click to expand...
Click to collapse
Right now I'm stock/unrooted and I intend to stay that way for the time being. I'll be heading to the mall later so I'll pay a visit to the Rogers store and Wireless Wave (awesome third party wireless store in Canada - they really know their ****) and see what they say.

I have the bell version. Just tested on lte. In my house locked on in 4 secs with no wifi.. Gps works great on my phone.
Sent from my SGH-I317M using xda app-developers app

Sorry I took so long to respond but I got sucked in to the mall lol.
So, long story short. Nobody has any clue and the unusually clueless staff at the rogers store (casual Christmas employees) basically said I need to talk to Samsung cuz my 15 days are up. The guys at wireless wave hadn't heard anything about anybody having any issues with gps. Finally, I went to Telus and found someone who actually had a clue and she said it was the first she'd heard of it and actually recommended I check xda.
On my way home now and then I'll call rogers. I'm not hopeful about the outcome lol.
Stay tuned...
I'll post back again when I
Sent from my SGH-I317M using xda app-developers app

@Class said:
Are you using the Perseus kernel? If so GPS does not seem to work correctly regardless of which location provider is used. I reverted to stock and my GPS works.
Click to expand...
Click to collapse
Im using the perseus kernel and get an almost instant lock but im on telus
Sent from my SGH-I317M using xda premium

RazzBot said:
On my way home now and then I'll call rogers. I'm not hopeful about the outcome lol.
Stay tuned...
I'll post back again when I
Sent from my SGH-I317M using xda app-developers app
Click to expand...
Click to collapse
sorry about your luck at the mall.
Curious to know what rogers says to you ! :good:

Hello folks,
Just an update .. I have been playing around with waze (free at the appstore) for the last day and a half and my gps has been flawless.
Our GPS issues could more then likely be with the actual Navigation app that comes pre installed.
By the way Waze seems to be very impressive I must admit :good:

I used something similar to that app posted.the ones I have is called gpstest.showing 0 satellites for me.like another poster said, should not have to restart the phone or flash firmware on it for GPS to work.it should work otb
Thanks for the feedback

deadpres said:
Should not have to restart your phone every time you want to use navigation.
I am having the same issue.
The GPS icon won't even display in the info bar without a restart.
Do you think this is a hardware or software issue ??
Click to expand...
Click to collapse
Interesting... I've had this issue happen only once. Nothing I did would start a GPS search. I waited about 2 hours outdoors in a car. Once I restarted the phone, it had a lock on lots of sattelites within 10 sec.
It hasn't happened since.

[Q] Does anyone know where the GPS Radio file is?

I had no problems with 4.2.2 using the updated t-modem.bin file with my phone, and it got super funky the other day, so I reverted to stock and rooted and proceeded to bring it to where I was before it went all goofy.
here is info on what is going now:
SGH-M919
T-MOBILE
BOOTLOADER - M918UVUAMDL
BASEBAND - M919UVUEMK2 (i flashed only the Modem.bin file) I get good all around data reception edge/4G/LTE.
However, Now, my GPS takes a hella long time to get enough of a signal to start the navigation, Sometimes i'm waiting over 10 minutes for a fix on location.
I tried using GPS Toolbox and reset and downloaded the gps file, but no joy there.... Sometimes even the GPS toolbox takes a while to "Find" all the satellites...
I thought if there is a GPS radio file I could reinstall, I'd rather do that than rebuilding the whole setup again. ALL the other stuff is absolutely perfect and I'd really prefer to keep things working like now, except for the GPS lock-on-time...
Thanks, I'll wait to see if anyone has input before I go re-inventing the wheel again...
Aloha!

Use Faster GPS to change the satelites it uses.

elesbb said:
Use Faster GPS to change the satelites it uses.
Click to expand...
Click to collapse
Thank You!
I never knew something like that existed, It seems to have made a difference already but I'll see how it performs over different destinations on a period of travel.
Thanks again!
Aloha Ke Akua !

elesbb said:
Use Faster GPS to change the satelites it uses.
Click to expand...
Click to collapse
I experienced a similar scenario between 4.2 JB and 4.4 KK, my GPS was super on 4.2 , back in March I took a screen shot as you can see, and then today . Less sats and I have to turn it on and off to get to start up.
I'm running Fenny's almost stock rom al present.
Pp.
sent from my bluetooth controlled toaster.

PanchoPlanet said:
I experienced a similar scenario between 4.2 JB and 4.4 KK, my GPS was super on 4.2 , back in March I took a screen shot as you can see, and then today . Less sats and I have to turn it on and off to get to start up.
I'm running Fenny's almost stock rom al present.
Pp.
sent from my bluetooth controlled toaster.
Click to expand...
Click to collapse
I haven't had any issues after using faster GPS. I even can get a lock in my basement.
Sent from my SGH-M919 using Tapatalk

elesbb said:
I haven't had any issues after using faster GPS. I even can get a lock in my basement.
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
Where do you navigate to in your basement?
Do you live in a castle? ???
Anyways, I don't like using apps, would rather figure out what's wrong or go back to stock.
Pp.
sent from my bluetooth controlled toaster.

PanchoPlanet said:
Where do you navigate to in your basement?
Do you live in a castle? ???
Anyways, I don't like using apps, would rather figure out what's wrong or go back to stock.
Pp.
sent from my bluetooth controlled toaster.
Click to expand...
Click to collapse
Lol my weather app tracks my location. But it's not that anything is wrong. It's just scanning for satellites that don't exist in your area so by using faster GPS you tell the GPS antenna to only look for satellites in your area.
Sent from my SGH-M919 using Tapatalk

May try if no other option, looking at ktoonsez kernel options for now, maybe a kernel may give me the fix I'm looking for as far as gps, LTE network disappearing.
Pp.
sent from my bluetooth controlled toaster.