yashsingh1/xdaforums huggingface dataset:
[Epic 4G General] zman519:
@Kenny the sprint thing would make scenes, But i just did some testing.

With an Epic 4G & a LG Optimus S the LG is no longer activated. (both Sprint branded phones)

LG, Turned airplane mode ON turned GPS back ON opened GPStest up & got a LOCK with in 10 sec running cm7.2 on the LG with a Froyo modem.

Epic airplane mode OFF 3G data on GPS on. GPStest has lock, then close GPStest, power up a RF cell jammer (CDMA GSM etc.) bars drop to zero the phones X radio icon pops up, Open GPStest NO lock NO birds/Sats = POS samsuck. Mean wile the little crappy LG is happy to tell us just how fast we are moving & is maintaining a lock of <12'

So i would say that, that test proves that airplane mode has nothing to do with it & its depending on the cell network for GPS to work. Can't samsung be sued for this BS? i mean if apple can sue them over the BS they come up with, One would think that if samsung says a phone has GPS but in all reality its a aGPS system that can't seem to function without external terrestrial based RF data links. Its just really to bad samsung got dragged in to the courts by apple over total CRAP & NOT by there own costumers over the junk GPS in the SGS 1 line. Just think what that would have done for the grater good of all smartphone to come after. :cool:

---------- Post added at 11:16 AM ---------- Previous post was at 10:54 AM ----------

The thing is that the phone CAN'T be used as a backups backup:(

i do agree with you that IF you need a Navigation GPS that you would not want to use a phone. But lets say We are going on a Hike/real camping trip into the middle of no where lets say the boundary waters. We have paper TOPO maps & a compass and we both KNOW how to do Land Nav with only the two tools the phone becomes totally useless as a backup. GPS is grate & i love it but when you go out in to the wilderness you always bring a weapon even if your NOT hunting or planing on firing it at any thing, Thats the same way i look at a GPS bring it maybe turn it on IF i really need it. its just fun to me to be disconnected & use a map & shot azimuths the old school way:cool:

If any one would like to know more about Land Nav just google FM 3-25.26 that way if your Epic is out of cell range hopefully you will not die because you could not find water to drink;)
[Epic 4G General] KennyG123:
Heh, I doubt you can sue over technological functionality, it would be like trying to sue Sprint because a call did not go through, but it could still have been Samsung's intention that the cell signal be available. I understand your frustration and the weird thing is if I uncheck use Wireless Networks to enhance GPS I still get locks, so what exactly is it looking for other than an authorized service provider on the network?
[Epic 4G General] zman519:
Maybe the kernel guys can find it? I doubt that its really hardwired into the chips, now days just about every thing is reprgramable. I mean if we can't do it with QPST where is it? Its the same on the ASOP rom right?

Sent from the Drivers Seat of my Suby txting and Driving doing 100MPH+ in a school zone! Ha.
[Epic 4G General] KennyG123:
I thought you tried it on CM7?
[Epic 4G General] zman519:
Yes. I just didn't do the kinda of indepth GPS testing I did this morrning. I would run it as a DD if the camera got fixed & or the thouchwiz camera got ported.

Sent from the Drivers Seat of my Suby txting and Driving doing 100MPH+ in a school zone! Ha.
[Epic 4G General] KennyG123:
So we don't know if it can run without signal on an AOSP ROM?
[Epic 4G General] zman519:
Ya i guess. i would do it right now but i'm running out of room on my stock SD, my 32 in in on a RMA:( Lexar :rolleyes:
[Epic 4G General] styles420:
I just tested it on CM9 (Samurai Kernel, no other mods) - I could not get a lock in airplane mode, even when I connected to wifi and used gps status to download fresh agps data. I tested several combinations of toggling wifi and gps off and on while in google maps and on the desktop, and no combination resulted in a single lock.

As soon as I turned airplane mode off, I got a lock (less than two seconds). I was not connected to wifi, and I had mobile data turned off. I had also wiped the agps data using gps status, without downloading new data.

So the 1x (voice) connection is required for gps to function - the question that remains, is whether that is because gps relies on the connection, or because airplane mode simply halts gps function - the only way to test would be to turn off all non-gps antennas without using airplane mode, which, if possible, will probably require some low-level terminal commands to accomplish (because there is no such toggle built in), or a complete lack of any coverage...
[Epic 4G General] zman519:
^^^ thanks for the test info

I do not beleave airplane mode has anything to do with it. As when u jam the 800 & 1900 Mhz cdma bands that this phone uses. other gps units & the LG as stated ^^ still maintained GPS lock with in the range of the RF jamming single. So its some thing samsuck did to the GPS in our phones, it will not work with out being in range of a cell network.

Sent from the Drivers Seat of my Suby txting and Driving doing 100MPH+ in a school zone! Ha.
[Epic 4G General] Blad3:
Same issue with me. Airplane mode did not let gps work, however turning off data did get an instant lock for me.
[Epic 4G General] zman519:
Data is not the issue, is the fact the GPS is useless in cell dead zones

Sent from the Drivers Seat of my Suby txting and Driving doing 100MPH+ in a school zone! Ha.
[Epic 4G General] styles420:
But the question is why? Is it because the GPS relies on something it receives over the cdma connection? Or is it because the software waits for the connection before reading gps location data, even though the connection isn't needed?
[Epic 4G General] zman519:
Ture Ture.

I would not be suprized at all if we found out that it DOES relie on some kinda signle from the cell network. Look how bad the GPS was on android 2.1 when the phone first came out. Maybe the reason its working now is kinda like a total hack & not ture sat baced GPS.

Sent from the Drivers Seat of my Suby txting and Driving doing 100MPH+ in a school zone! Ha.
[Epic 4G General] tmillz:
I tried this and it doesn't seem to work for me. Tried unchecking the hybrid modes too. I'm in Portugal so there is no service. Running AOKP build 38.
[Epic 4G General] zman519:
See that's my whole point, samsung totally jacked up this phone. What is the point of having GPS in a phone if it relies on cell towers?

Sent from the Drivers Seat of my Suby txting and Driving doing 100MPH+ in a school zone! Ha.
[Epic 4G General] olicmunic:
On here are about as clear as mud.

I can say thanks for the hard work you guys put in but you really need to stop assuming that everyone is programing at degree level.

After 4 broken mouse a broken cup and 4 sleepless nights I'm giving up trying to root the wildfire..

I don't even want the thing in this house anymore!
[Epic 4G General] styles420:
Well, the primary function of the device is still phone calls - why would they care about whether the phone can function without their service? All they worry about (and not nearly as much as we'd like) is that it works well enough while it is connected. Given the amount of complaints about their service in that department, it seems silly to expect anything better for when the device is out of service.

Besides, they would then have to acknowledge that they don't have the best coverage in the nation - and they prefer to talk about what they do have, it's better for sales ;)

I'm not disagreeing with you, I'm just asking, are you really all that surprised?
[Epic 4G General] zman519:
Well I'll say this after the Epic its going to be years if ever that I buy a dam thing with samsungs name on it. The gps was total junk when I got the phone with android 2.1 & now that it kinda works its not really a gps, hell I drove throw the U.P. today & guess what happend? :rolleyes:

Sent from the Drivers Seat of my Suby txting and Driving doing 100MPH+ in a school zone! Ha.
[Epic 4G General] zuluepic4g:
gps

qpst cant find my phone im stock fc09 carrier flashed to metropcs
[Epic 4G General] KennyG123:
Update: my Epic is deactivated from Sprint and GPS Test finds 9 out of 11 satellites.

However for Maps or Telenav to get directions it needs to be on wifi.
[Epic 4G General] zman519:
Hummm?

But the phone will still work for 911 so some parts still work on the cell radio
[Epic 4G General] MДЯCЦSДИT:
Download a gps app (tomtom or something) over wifi.
[Epic 4G General] zman519:
Copilot^
[Epic 4G General] Night AoX:
Well Here's My Official Weigh In...

My GPS apps certainly have got quicker on the draw with giving directions. Oddly the apps themselves are slow with rendering the map placement updates so, there's a syncing issue but, that issue lies with the apps themselves...
[Epic 4G General] KennyG123:
Yes! Thsnks. Got one that caches and downloads maps to the sd card and works without a data connection. I don't know if it will work without the 911 cell signal though.
[Epic 4G General] Night AoX:
It won't work on Metro PCS because ##8778# is a Sprint utility.
[Epic 4G General] MДЯCЦSДИT:
No. It is an android utility. As long as you are on a stock based rom, you can use it. I've done it on a deactivated Epic before to put the settings back to normal to sell it.
[Epic 4G General] Night AoX:
Sorry

It won't work on Metro PCS because ##8778# is a Sprint utility.

---------- Post added at 03:35 PM ---------- Previous post was at 03:28 PM ----------

Didn't realize the post ^^
[Epic 4G General] labumm:
I can add another observation.

I am on CGB w/GPS fix. I have not applied the mod discussed here yet. I was sitting at a trail head in the adirondacks w/ no spint service but with roaming sevice (and 1x roaming data). Using GPS test I can lock to 9+ satellites. I have a great view of the sky.

As other have noted in this thread: Then put phone in airplane mode. It continues to lock until I do something, like switch to another app. Then the GPS lock breaks and will not re-lock. The only way to get it to re-lock is to take the phone off airplane mode.

The reason I wanted to do be in airplane mode was to save battery. In this environment the phone would be going in and out of roaming and no signal. I wanted to go hiking amd record my track.

Possibly new observation: Then I disabled all roaming AND data. The phone reported that I had no service. But the GPS now locked. I cannot say for certian that there was zero signal, only that the phone said so. But under these settings and conditions the GPS did keep its lock while switching to other apps.

Higher up on the mountain I did get Sprint service. The GPS did not flake out noticably over the next 4 hours.The exception was when I took a photo. The GPS needed to re-lock after that--not sure why that happens.

It could be that a low level Sprint signal is allowing GPS to lock in my case. In a previous post, zman519 used a jammer to mask the Sprint signal, which did prevent the GPS lock.
[Epic 4G General] labumm:
I tried this fix and I could not get at lock in airplane mode (GPS status). Sitting in a CRJ900 at the gate holding the phone to the window. No lock in airplane mode. Turning off airplane mode and it gave 9 satellites within seconds.

I thought it was working when I was able to turn the phone back on. It truned out that I forgot to place it in airplane mode. oops. But above 5000 ft the cell signals rapidly fade, I was only able to lock to 3 of 4 satellites and naturally got garbage speed and altitude readings (~180 mph and ~190 meters). Then the lock was completely lost.

Recognizing my mistake, I rebooted in airplane mode. No satellites. No lock. :(

The result is the same as zman519 reported with the jammer.

So my sucess in the Adirondacks must be due to fringe signal, which evidently is enough to keep it working reasonably. I was looking at nature (and where I was putting my feet) rather than the phone. So I cannot say if the GPS had intermittant lock problems. Although the track was reasonable.

Here are the settings read back from the phone with QPST. Let me know if I messed something up.

gpsOne

Allowed checked

Capabilities

Assistance-Spherical checked

Assistance-Cartesian checked

AFLT uncheck

GPS Almanac checked

GPS Ephemeris checked

GPS Almanac Correction checked

Autonomous checked

GPS/AFLT/Hybrid uncheck
[Epic 4G General] zman519:
I still say samsung gives us the code & a fix, or we all sue them over the gps problems. anyone who got the epic in 2010 knows what I mean

Rocking cm9
[Epic 4G General] davidrools:
Thank you SO MUCH for finding and posting these instructions. This is the ONLY thing that I hated about my Epic 4g. I even bought an old bad ESN Droid Incredible to use for GPS mapping for when I go off grid. Now I don't have to manage a separate device, etc.

I followed these instructions to the letter. Had to revert to stock ROM, It did not work using my pre-rooted but otherwise stock ROM. I re-rooted before I got to test in an actual off-grid situation, but just got back from a weekend trip and verified that this fix worked 100%! Zero cellular or data reception, not even roaming. GPS got a good lock, but took a full 10-20 seconds (as is typical for non assisted GPS).

Again, Thank you thank you thank you! :good::good::good::cyclops::fingers-crossed::fingers-crossed::laugh::good::victory:
[Epic 4G General] zman519:
What all one do you have checked? Unchecked?

Rocking cm9
[Epic 4G General] zman519:
xboxfanj asked me about GPS testing with the Nexus modem in another thread.

So hears the info

Objective

Test GPS with Nexus KL2 Modem & airplane mode & or NO CDMA coverage

Phones setting

gpsOne

Allowed checked

Capabilities

Assistance-Spherical checked

Assistance-Cartesian checked

AFLT uncheck

GPS Almanac checked

GPS Ephemeris checked

GPS Almanac Correction checked

Autonomous checked

GPS/AFLT/Hybrid uncheck

Baseband = D700SPRKL2

android 4.0.4

ROM cm9.1

Kernel = 2.6.35.7-stock-CM9_CrpMdm From hear NS4G modem patch for any CM7/9/10 based rom

PRL = 11115

Test 1

1) had GPS lock,

2) stopped GPS using app/s turned off GPS

3) airplane mode ON

4) Turn ON GPS & open GPS Test, GPS Status, Maps, Etc...

result NO GPS lock:crying:

Test 2

1) had GPS lock,

2) stoped GPS using app/s & turned off GPS

3) Powered up RF jamming single on CDMA & GSM bands

4) waited a little for the phone to have ZERO bars & say "no service" or single i forget what cm9 says

5) Turn ON GPS & open GPS Test, GPS Status, Maps, Etc...

result NO GPS lock:crying:

This testing was done on a lake over 8 miles from shore i originally was planing to go out far enough to loss Cell single. But at 8 miles & still having good single on Sprint & AT&T we decided to just use the jammer. Will report back next time i do get totally out of cell range, Not that it really matters to do further testing i think at this point all of us that want GPS to work under a NO cell single condition & or Airplane mode know that samsuck is never going to fix our phones GPS & we are SOL:(

P.S. i have done this test a few more times with Reboots with Airplane Mode already ON. Also rebooted the phone in a jamming field & i have done the testing in a good serves area.

Another Note my Friends HTC Inspire 4G from AT&T runing Stock GB passed all the tests as we did both phone at the same time.

Once again this just leaves me pissed as hell at Sprint & Samsuck! some may say WHY you mad at Sprint? I'L tell you why if your going to have your dam Name Cromed on to a phone then you BETTER take some responsibility for it malfunctioning & not working as ALL other GPS's in other android smartphones do! If any one knows of any other android or any smartphone that acts like the Epic does with GPS not working out side of cell coverage zones tell me about it, Cuz the Epic 4G is the only phone i have seen that acts like this.
[Epic 4G General] eigerzoom:
why did i bother doing this? someone tell me why i thought there was something to this?

my gps was working fine...as good as ever...

now i got nothing after these edits....and yet still nothing after resetting to previous working original settings....

dont say user error...i use qpst more than everyone in this post

damnit i'm pissed
[Epic 4G General] eigerzoom:
had to do a full reset ##786# - rebuild efs - to get gps back
[Epic 4G General] zman519:
Glad you got it back up, and running

Rocking cm9.1
[Epic 4G General] styles420:
If the efs has more effect on GPS than the qpst settings, then perhaps it is also the key to getting GPS off of the mobile signal's teat ;)

Does anyone have any insight about the efs? What it does, how it can be edited, etc - maybe we've just been looking for the solution in the wrong place...
[Epic 4G General] Night AoX:
Any way to boost Wi-Fi performance?
[Epic 4G General] flastnoles11:
Yes, but
[Epic 4G General] Night AoX:
Don't feel like it just yet. It'll be better if someone here knows and can potentially save me some time.
[Epic 4G General] flastnoles11:
Rule of xda, search before posting... admitting that you don't want to search to save yourself some time probably won't get you much help... everybody has lives, not just you... what makes you think I want to spend my time searching for something for you when you don't want to spend the time yourself... google is your friend...
[Epic 4G General] zman519:
Hummmm. Got a point. What about that efs tool for samsung? Ant one try that on STOCK ?

Rocking cm9.1
[Epic 4G General] Night AoX:
In other words, you don't have an answer. That's very condescending. I have no ego. The rules also state that we're allowed to help each other out. I never said I wasn't going to search on my own and I certainly never stated no one here has a life. I simply asked a question in a thread originally started as a tutorial on QPST. I'm simply asking people who seem to know what they're talking about if they have a definitive method on how to boost Wi-Fi. I can search on my own but, it has to wait for now. In the meantime I figured I should just ask here.
[Epic 4G General] KennyG123:
First off you are not even close. This is a GPS thread. Second as a moderator I missed that rule stating you have to help others, Although most do and the best thing to teach someone is how to search especially when they are posting off topic. You should have asked your question in a new thread in Q&A.

Thank you for your cooperation

Friendly Neighborhood Moderator
[Epic 4G General] flastnoles11:
Oh how wrong you are... I have the answer... but after spoon feeding around 15 people answers yesterday, I don't feel like doing so today... the time you spent on posting, you could've searched and came up with the answer on your own... good day sir...
[Epic 4G General] zman519:
O darn..... I saw this thread popup with posts & thought maybe someone had made headway on the GPS

Rocking cm9.1
[Epic 4G General] Night AoX:
I'm merely seeking a little advice & was hoping that by chance some kind person with QPST tools knowledge would get back to me not to inconvenience others or to make my load more important than others but, simply to move a hill rather than a mountain. Ouch. I never said the rules stated we're obligated each other but, that we're allowed to. Double ouch.

---------- Post added at 01:31 AM ---------- Previous post was at 01:18 AM ----------

Look I'm not trying to start a whole thing. Just inquiring. If no one responds, my world won't end. I'll just have to wait to dedicate time to searching for it on my own. And I wasn't referring to you when I said, "In other words, you don't have the answer." That was directed toward someone else. I didn't spend all that time thinking of what to post next. I was orchestrating a lawsuit against the city of Philadelphia and the prison system with my lawyer while and writing an essay. It's going pretty good actually. But, until I have more time allotted to this, maybe someone will see my post and will be willing to help me.
[Epic 4G General] flastnoles11:
My point was... if you spent all that time typing (not thinking about) that post, you could have easily typed "wifi speed performance improvement android" or anything close to that into google and you would have found your answer... and that would've taken about the same amont of time as your first post... anyways, check this out, but please do try to search on your own next time... http://xdaforums.com/showthread.php?t=1346680

Edit- and good for you, standing up for poorly treated inmates! Not being sarcastic at all, I know how poor the conditions are in prisons around the us, completely disgusting! Even if it doesn't effect me, thanks on their behalf!
[Epic 4G General] Night AoX:
Thanks for the link. One thing I know about searching for things that your everyday user doesn't know about can be a daunting task. What's more, potentially jacking hex data is an entirely different ball-game aside from bricking a phone. From what I understand, data tables with using QPST is quite more complex so, as I mentioned before, I figured I'd simply ask people who appeared to have the proper knowledge. I wasn't trying to thread jack. At the expense of sounding egotistical, I'd be flattered if someone personally sought my help. If you wanna know anything about Audis & Saabs, I'm your man.
[Epic 4G General] toolegit:
http://bash.org/?152037

Just sayin'.
[Epic 4G General] zman519:
Rofl thanks for posting that. It made my night.

Rocking cm9.1
[Epic 4G General] EllGuapo:
Better GPS Locks

I am not a developer so really should not do more than lurk in this thread, I do realize, but just wanted to report back that my GPS performance greatly improved after the FI03 ROM/ modem leak. Any of the newer modems do not work well for me, or any of the modems that I tried before that. I was surprised to see myself suddenly getting good locks, even in cloudy weather, down to 5-10 meters, after installing FI03 when it first leaked. Occasionally I use an AGPS update to "kick it into gear" if it won't lock, but after that the performance is good enough for turn-by-turn and such.

I am quite happy to get good results, as I was convinced I had bad hardware but loved everything else about the phone and didn't want to try and exchange it. I still get 0 response to satellites while indoors but outside it's usable and much improved. I think now I should be okay to keep this phone for another year.
[Epic 4G General] Night AoX:
That was just the chuckle I needed in the wake of Hurricane Sandy. Damn Mother Nature.

---------- Post added at 05:01 PM ---------- Previous post was at 04:06 PM ----------

Once again, thanks for the link. Sadly it's ancient & according to the posts, results seem to be hit & miss. Hopefully somebody there will get back to be but, the OP says to make a flashable zip but, there are no instructions on how to do that so, now I'm off to try & figure out.
[Epic 4G General] flastnoles11:
http://d-h.st/3nzgolp0e54a/DataSpeedTest.zip here is the flasable... it is an old tweak, but its a well known linux tweak that should work out just fine regardless of being old... I used it for awhile, but forgot about it until recently... it works well enough, just remember to make a backup in case it doesn't help, or worse yet, breaks something else (it shouldn't)
[Epic 4G General] Night AoX:
Thanks man. I did find a way to make a zip file flashable using Aroma App Package Creator but I'm not sure if it'll work the way I need it to. I just made the file & placed it a subfolder system/etc/*filename*, I flashed it & it said everything was successful. I checked to see if the new file would be in the etc directory on phone boot but, it wasn't so, I don't know if it actually worked or not. Speed tests were pretty much the same. I'm now thinkg Aroma is just for apk files. That would suck. Sadly I didn't get to post back until now.
[Epic 4G General] pedro1977:
This shouldnt work on samsung phones, they use gpsd and i think you should use lbstest mode to alter the settings.