yashsingh1/xdaforums huggingface dataset:
[ONE Q&A, Help & Troubleshooting] TheShoxter:
I'll go ahead and flash the PA Gapps camera module and let you know if it works :)

UPDATE: I tried to flash the PA Gapps camera module and it failed to install because it said was incompatible with my device.
[ONE Q&A, Help & Troubleshooting] dondavis007:
Thank you! Good to know.
[G3 Q&A, Help & Troubleshooting] Liran Israel:
in G2 and Optimus G Pro there is a video editor, I can't find it on my G3. may be the file from G2 4.4.2 will work on G3 4.4.2 ?
[G3 Q&A, Help & Troubleshooting] Skizzy034:
Try it and let us know.
[Galaxy Note 3 Q&A, Help & Troubleshooting] thahim:
I enabled LTE, but its gone after updating to 4.4.2 and i forgot how I did that.

Can any one tell me the procedure again for 4.4.2?
[Galaxy Note 3 Q&A, Help & Troubleshooting] ardom:
If you are talking about the Device Information *#*#4636#*#* Option that forces to use LTE only. Then you must be rooted first then download Advanced Signal Status on Playstore.

But if you are talking about the natural way. Just go to Settings > More Networks > Mobile Networks > Network Mode, then set LTE/WCDMA/GSM
[Galaxy Note 3 Q&A, Help & Troubleshooting] thahim:
I'm rooted but theres no option of lte in network settings.

I remember editing a file before and got that option on 4.3.

Sent from Galaxy Note 3 SM-N9005
[Android Q&A, Help & Troubleshooting] Alex1a:
Many jiayu users complain about bad or even unusable GPS, even worse than on other Mediatek devices. We all hope, it's a software issue and can be improved.

Let's collect information here. Please help by summarizing statements from other threads here and include links to the sources. Please stay on topic :)

General discussion about this device is here

Read a trojan warning here

Maybe I will update this first posting with the most useful information from time to time...
[Android Q&A, Help & Troubleshooting] Alex1a:
Software issue

I have the very strong and positive feeling, it is a software issue:

When I got my device with the 20140410 ROM, the GPS was really bad. Time to first fix was sometimes fast, sometimes it took more than 5 minutes, and accuracy was really bad most of the time. And as I could see on the map, it was much worse than reported - accuracy as can be seen i.e. in the GPS Test app was many times quite ok, like 4-7 meters, but the position on the map was 50m off, or more. Many times, the GPS continued to advance in the original direction after I stopped or changed direction. Sometimes there was some fixed offset, which stayed the same for 15 minutes.

Or I had a usable fix for a while, then I paused GPS just for a minute, and next try again took very, very long, even with a fresh AGPS download.

And all those problems under clear sky!

I tried many suggestions I found, but nothing really helped.

Then I upgraded to the 20140609-211642 ROM and first didn't notice a difference for some days (but didn't make methodic tests, and didn't use GPS much) and tried some of the suggested fixes again.

I also read about a hardware fix with some photos. I opened my back cover, just to see if my GPS antenna looked the same. I pressed the antenna down with my finger.

Then I noticed my GPS became really good! For a week I really enjoyed usable GPS and was very happy.

I thought it could be bad electric connection of the antenna to the mainboard, which was improved by pressing it down. But now I think it is not related:

After that week I got aware of the trojans in that ROM and restored a backup from before. Back to the April ROM, my GPS was immediately as bad as before! :( - pressing down the antenna didn't help again.

This unusable GPS annoyed me a lot last weeks and yesterday I decided to try the BORX ROM, but before I started a short test by restoring the 0609 backup where it all worked so well. I didn't have the time to really test (and I'm afraid of enabling internet - of course the 2 trojans are removed, but who knows what else is in there?). But it really looks like it is much better again! (First fix took really long without AGPS, of course, but then it was accurate, and also next tries, hours later, were fast.)

The problem is, I don't know exactly what I did, and don't have much time for experiments. So I don't know if it's just the newer ROM, or other changes. Can someone tell me what config or other files to compare between the 2 backups? I can also post them here.

Alex
[Android Q&A, Help & Troubleshooting] Doman:
My points and observations (I've tried 3-4 different 4.2.2 ROMs and 2-3 different 4.4.2 ROMs).

- GPS for me was about the same regarding its accuracy

- fix time also about the same, a few seconds up to a minute on the clear sky, a few minutes up to "give up" in the woods/buildings

- every ROM had a 1 hour difference bug between GPS reported time and the actual local time

- almost every time accuracy reported by GPS Test is very good (~4-10m)... the real one is much worse, I can confirm what Alex1a noticed. Also, what is really strange, my wife's Galaxy S4 Mini GPS Test accuracy (Snapdragon with Glonass) is significantly worse, yet there is no navigation and positioning issues

- some apps (Google Maps as example) have an arrow pointing your movement direction... this is usualy different than the real direction. Even the map is not rotated well.

I've sent a few emails to the Jiayu people I've found on some official website... but there was no response at all. I know that there is quite a strong community in Spain (Jiayu.es) and in Russia (4pda.ru). I'd also appreciate if anyone native tries to speak to these people regarding our GPS issues.

The good word is, that the GPS works :) I've done ~1000km over the last weekend and G4S led me to the places I needed. I've used Sygic, that in my opinion has better algorithms handling bad GPS signal. It also shows a nice line to the planned road, when the GPS signal puts you in the adjacent forrest :) The problem for me is, that the navigation can become frustrating, nervous and annoying. Especially when you have a lot of small and close roads/turns or you need to use it very quickly from the time you start the app.
[Android Q&A, Help & Troubleshooting] Alex1a:
I am trying to play ingress (a gps game) and half of the time it is unplayable. Ingress also often just quits/crashes without notice, and I think it is because it detects my gps as a fake gps for cheating :(

When that happened, I restart ingress immediately and sometimes it took more than 5 minutes to get a fix again, even though it worked seconds before.

With 0609 this was much better during that week.
[Android Q&A, Help & Troubleshooting] Alex1a:
I'm still on 20140609-211642 and GPS is really usable - much better compared to 0410, even inside a building, where 0410 could run hours without getting a fix! Please tell me what to compare between the two backups, to find out what setting makes this difference!

I am not sure, but I think I used MT GPS and faster GPS on both ROMs. Let's find out.

In the EngineeMode I saw some automated tests, and I am willing to do them with both ROMs - if someone exactly tells me how. I am too busy to find out myself...
[Android Q&A, Help & Troubleshooting] LuxZg:
Alex1a, could you quantify "really usable" when on 20140609-211642 ROM? How long does first fix last (in the streets), and do you have accuracy problems where GPS puts you on a nearby road by mistake?

I'm sorry I can't help more at the moment, I'm still holding off from buying this phone, but GPS is the only real issue I have with it, if I knew it would work correctly I'd get it right away, but everywhere I read problem is the same and since this is one of 2 reasons why I'm changing my current phone it's really important to me that it works fine :(

[EDIT 2014-Aug-06]

Here is one feedback, anyone else?
[Android Q&A, Help & Troubleshooting] srkonus:
I tried the GPS today again under heavy enviroment (inside a building, many metal around) and i got a fix on the window. In use was the TeamForce Kitkat Android L style without any changed (GPS location/time server is spain, i am sitting in germany). I have the feeling that i had only problems if i change it to germany.

The GPS on my old Samsung Galaxy S is more better but the G4S is enough for my use (tracking of running, car navigiation).
[Android Q&A, Help & Troubleshooting] LuxZg:
Thanks for your feedback, looks like this is it.. If you get a chance to test it on road (car navigation or tracking), just to see if you get any issues with "signal lost" or being put on the wrong road / in the fields beside roads and similar that would be great as well, but I'm thankfull for this much as well as it sounds as good news for all owners (and future owners :) )
[Android Q&A, Help & Troubleshooting] Alex1a:
Hard to quantify :) - I was really happy most of the time in the last weeks. First fix after long time of no use felt a bit long, something like 1-2 minutes, but then "real" accuracy was good and especially getting a new fix after some minutes of standby, was 5-10 seconds, I would say. With the older ROM, it sometimes took 5-10 minutes, even after only seconds of stopped gps.

BUT! yesterday, still on the same rom, I did a bicycle trip. first fix took more than 5 minutes, that was annoying. Then I recorded a track for about an hour. The track was quite accurate and looked good. Then I stopped the tracking and GPS. Only 20 minutes later, under free sky, I didn't get a new fix, no matter what I tried. Some time later, after some reboots it worked again, but was very inaccurate...

You mean the time server set by "faster GPS" app? I tried that and rebooted, but no positive effect. I'm in germany, too.
[Android Q&A, Help & Troubleshooting] LuxZg:
Just ordered the phone, when it arrives I'll do as many tests as I can.

In the meantime - I'm assuming you did all this because I've seen this (and similar) solutions all over the forums and YouTube, but let me propose it just the same:

What you need is Mobileuncle mtk tools,root explorer,gps test download them from play store.
THIS SHOULD BE DONE OUTDOORS.

1. Turn GPS off on your phone.
2. Open Root Explorer and find the mtkgps.dat file in /data or /data/misc
3. Delete mtkgps.dat
4. Reboot phone
5. Open Mobileuncle Tools
6. Tap on 'Engineer Mode'
7. Tap on 'Engineer Mode (MTK)'
8. Scroll across to 'Location'
9. Tap on 'Location Based Service'
10. Tap on 'AGPS' and then make sure 'A-GPS On/Off' is checked
11. Tap on 'EPO' and then make sure 'Enable EPO' is checked
12. Swipe down (notification bar) and turn GPS on
13. Hit back and then tap 'YGPS'
14. Wait until you get position lock (mine took about 6 seconds).
15. This process should create a new mtkgps.dat file.
16. Hit home button and open GPS Test.
17. You should get a position lock reasonably quickly.

Also setting /etc/gps.conf (with any root-supporting text editor) manually to settings such as these:

NTP_SERVER=europe.pool.ntp.org
XTRA_SERVER_1=http://xtra1.gpsonextra.net/xtra.bin
XTRA_SERVER_2=http://xtra2.gpsonextra.net/xtra.bin
XTRA_SERVER_3=http://xtra3.gpsonextra.net/xtra.bin
INTERMEDIATE_POS=1
ACCURACY_THRES=5000
SUPL_HOST=supl.google.com
SUPL_PORT=7275
SUPL_TLS_HOST=supl.google.com
SUPL_TLS_CERT=/etc/SuplRootCert
PHONE_TYPE=UMTS

(instead of europe in first line you can modify according to lists on this website: http://www.pool.ntp.org/zone/@ )

EDIT: On my old (current) phone, I also have these issues with GPS, and doing above helped a lot, but it seems that I need to repeat some of the steps from time to time. Interesting thing is the delete of mtkgps.dat, sometimes it's enough to turn GPS off, delete it, and turn it back on and go to YGPS to renew the positions, and it works in <10 seconds. We'll see if Jiayu has same or better/worse track record.
[Android Q&A, Help & Troubleshooting] Doman:
Rom: G4SW 20140609-150354

I've installed a new ROM yesterday. Well it's not new, but I haven't met it before.

It is a stock ROM but modified by Jiayu Poland. So it is official one, but nicely cleaned from Chinese apps, keyboard is normal, no troyans... a nice worldwide multi language official ROM that you can use "out of the box".

But what impress' me the most is the GPS. It's the best one I've ever met on Jiayu G4S! This one really works for me! At least at the moment :) I don't know if it is because it's a fresh installation or the GPS is set for my part of the world. The facts is that the GPS fixes within seconds without 3G and I can get a fix even inside the building. What is more it is the first ROM that the arrow directing my position is aligned properly and it moves exactly as I turn around with the phone.

I've made a simple point to point navigation today morning. A few times it still put me on the adjacent road... but it is still WAY better experience than before. My cursor used to stop when I stopped... that did not happen before, it was always living it's own life :)

So please give it a try yourself and let me know if I'm dreaming or this one actually works. This is 4.2.2 for Jiayu G4S 2GB/16GB:

http://jiayupolska.pl/download/rom/G4S_20140609-150354_[jiayupolska_PL].zip
[Android Q&A, Help & Troubleshooting] LuxZg:
Thanks for the info, I just got a new G4S and will try this soon, as GPS is important to me, and I sure don't need trojans and chinese apps :D

Could you just tell me one thing, does this ROM still have Caller ID bug or is that one fixed as well?
[Android Q&A, Help & Troubleshooting] Doman:
Hmm... hard to tell as I've never experienced that problem. An easy way (step by step) to check that?
[Android Q&A, Help & Troubleshooting] LuxZg:
Do you get SMS threads for contacts separated because of numebers (not) starting with country code, does your phone show who's calling correctly, etc? But we'll be offtopic here, perhaps just edit your post in the "main" G4S thread

EDIT: Just came back home, downloading it, and erasing original system to factory settings.. will be there soon myself to check GPS, but I won't have SIM in it for a day or so..

EDIT2: installed, got GPS fix in 10 seconds from window, which is good, but I had WiFi running. I'll install iGO soon, and check on the road next day or two
[Android Q&A, Help & Troubleshooting] borx28:
Jiayu's GPS.

In many roms that problem is now fixed. MTK chips normally do not usually behave very well with their gps. But Jiayu suffers a lot from this lack. That is solved by changing a line system / etc / agps_profiles_conf.xml roaming on the file.

roaming = "yes"

And the application of Google Play "FasterGPS" help position quite quickly.

Only then the terminal has no problem to download the epo file and position well satellites.

Greetings. ;)
[Android Q&A, Help & Troubleshooting] Doman:
Sorry, but that's just theory. In practice people claim that GPS is fixed in thier ROM but it did not work for me. GPS I mean not only the fix time but also accuracy.

Apart of the ROMs I've tried a few additional apps and fixes... with not much improvement.

The ROM quoted by me it's the first one that GPS works out of the box, without any additional fixes and apps and on GPS antenna only (no AGPS at all).
[Android Q&A, Help & Troubleshooting] Doman:
If anyone do some GPS navigation tests please try both with mobile network assistance (AGPS) and without it.

I'm not sure if I'm right, but I have a feeling that with a ROM from post #11 the navigation apps work better without that assistance, with the GPS antenna only.

A few days now and I'm still amazed with that ROM regarding the GPS usage. Anyone unsure I recommend to give it a try :)
[Android Q&A, Help & Troubleshooting] doping1989:
Hello,

Good News.

Can you install Xposed and gravitybox in this ROM?
[Android Q&A, Help & Troubleshooting] borx28:
Roms with GPS fixed.

Hello everyone! Apart from the many roms (and very good all) that ye can download, there is a website where there for our G4S and the G3S. androidteamforce.es

I say this because there all roms have fixed the gps well and are very stable. And even more so those in kitchen. If you want to try, you know (are also in needrom). While development is Spanish, the website is translated into English as well.We recommend them! I'm using the AOSP v2 with fixes memory and root, and I'm doing everything works perfectly, even Titanium. The GPS usually takes me ten radars detected, seven or eight. A marvel.

A greeting.:o
[Android Q&A, Help & Troubleshooting] LuxZg:
Hmmm... now I'm not sure if I'm seeing things either, but you could be right. It took me few days to transfer 100% to new phone so I was testing it on and off. Always with WIFI/3G turned on. While I got fix quickly, precision was a bit off, well.. up to 40-50 meters sometimes, enough to cause problems.

Today on my way from work I've turned on tracking, was still for a minute or so, and than started ride on a bike. Than minute or so later I remembered your advice, and turned off all data (Wi-Fi/3G) and continued. Now I'm looking at a chart, and first part of the ride looks terrible, like I was a crazy bug flying all over the place (with speeds up to 80km/h), and than suddenly I'm straight on course, with normal data being recorded and all the way to the finish line. From the tracking side, first 3,5 minutes I was off by soooo much, but from then on I had a positional error of margin of about 5 meters, no more (other side of the road etc.), and kept on going like that for 14 more minutes.

Since I'm biking a lot, well, when it's not raining, I'll do some more tracking, and I'll track test routes with car as well. I'll try not to use WIFI/3G at all during tracking, and we'll see if data will be consistent. I know that GPS on this ROM isn't perfect, as can be seen from todays 80km/h data and some extra 2km while I was mostly standing, but let's see if indeed data is being a culprit for GPS errors. Who knows, maybe the same way as Bluetooth interferes with Wi-Fi / Wi-Fi Display, maybe Wi-Fi and/or 3G causes malfunctions in GPS data, or somehow chip uses Wi-Fi positioning in addition to GPS causing it to add wider errors. We'll see, so far this is just a theoretic thing, I'm waiting for at least 4-5 good rides till I'm satisfied ;)
[Android Q&A, Help & Troubleshooting] Doman:
Theoretically I could, but I haven't done/used that before. I'll need some free time to read a little bit before, so I cannot promise anything.

Good good :) Appreciate any extra tests and suggestions.

I've been doing my test based on Google Maps. This navigation app still sometimes puts me on the adjacent road and I have a feeling, that it has very slow responses on my turns. It takes some time to rotate the map after the turn.

But ironically when I register my ride with Google My Tracks the record is really nice and sticked to the actual road! So I'll try to make some tests with other navi apps soon.
[Android Q&A, Help & Troubleshooting] LuxZg:
I'm not trusting Google Maps much, I use iGO MyWay / Primo for car navigation, and Strava for bike tracking (and tracking in general, bike, walking, running, skating, whatever).

Anyway, I did another bike track this morning on my way to work, did not get fix in first ~1 minute of ride because I had WiFi/3G off. Than I stopped for a moment, turned them on, got fix in some 10 seconds, turned WiFi/3G off again, and went for a ride. Data was great, accurate all the way from start to finish, accuracy seems to be +/- 1 meter or there about, it traced me exactly where I went, and if I changed lanes on the street it correctly traced everything (was raining night before so I was catching dry parts of the road ;) ). I'll do another few runs next few days, just hopefully sun goes up so I can go out for a ride as much as possible :)
[Android Q&A, Help & Troubleshooting] LuxZg:
Another test done. This time I got a lock before starting a ride, with WiFi/3G I got it before I took my bike of the stand, than I turned both off, and went for a ride "offline". On arrival I checked the data, and this time it was a bit worse - errors were about +/- 5 meters off. Which is actually great :D I'll report again tomorrow, seems the weather will be fine and I should have another data point in the morning. If I go out today I'll report as well.

But I'd like to ask others to start testing without WiFi/3G and check the accuracy in that case. If this is true we're one step ahead. Than we can test with WiFi on / 3G off, or WiFi off / 3G on. We can also test with both turned on, but A-GPS turned off in GPS settings, or turning "Wi-Fi & mobile network location" .. etc, etc. I hope someone that uses GPS more often joins me soon :fingers-crossed: ;)
[Android Q&A, Help & Troubleshooting] but-888-:
Great thread, will do testing the same this evening, so just to make sure, you mean switch off data and not uncheck the usage of mobile/wifi in the gps settings?
[Android Q&A, Help & Troubleshooting] Doman:
What I've done I have disabled location/positioning with WIFI/Mobile networks under phone Settings. Mobile data itself is enabled, another way Endomondo or Google Maps wouldn't work.
[Android Q&A, Help & Troubleshooting] but-888-:
So tested the above today on a 30km drive which i drove the last week twice with the wifi/network location enabled, i had a fix at the beginning but lost it quite fast, and the phone could not get a fix for the whole time afterwards, so above for car Navigation is a killer, no Navigation possible at all. (partly cloudy, open streets no buildings approx 100km/h speed during driving
[Android Q&A, Help & Troubleshooting] Doman:
What ROM have you got? Have you tried to reboot the phone? It used to help me on the previous ROM when I had a problem to get a fix.
[Android Q&A, Help & Troubleshooting] but-888-:
Running borx v3 jelly bean, no reboot performed, will Check this later on if it helps
[Android Q&A, Help & Troubleshooting] borx28:
That's my rom! I hope you do fine. If you want to spend a kitkat I recommend the Rainbow. that has no problem with the root or the touch screen. Geetings.
[Android Q&A, Help & Troubleshooting] but-888-:
Hi Borx, i know its your ROM, its outstanding, smooth, stable best ROM imho thanks for it
[Android Q&A, Help & Troubleshooting] LuxZg:
I did some more testing, and all tests with either WiFi/3G off, or having "Wi-Fi & mobile network location" turned off in "Location access" has me great results with Strava tracking app. I'm always tracked on the road I drive on, no mistakes there.

On the other hand, driving in my car with iGO Primo I had several "recalculating route" situations due to GPS putting me in wrong nearby road.

I did save tracking info, but due to iGO settings being bit funny, I got only summary, no tracking info. I've fixed this now, so on a next drive I'll compare if saved tracking data is same as mistakes it makes during driving. I've also turned on NMEA logging in iGO to double-check everything.

So since I usually track with Strava when on bike/walking and iGO is for car navigation, I went to log 2 car drives with Strava. Except breaking some records for fastest bike ride on few segments ( :D ) nothing out of the ordinary, again all tracks were correctly placed on roads I was driving.

I'll report more when I gather some more data.

P.S. This is all on jiayupolska.pl ROM, build number G4SW 20140609-150354 - no modifications done at all.
[Android Q&A, Help & Troubleshooting] Doman:
I have some nice experience with a free navi app called MapFactor Navigator using OpenStreetMaps. It gives me much better street navigation (overall) than Google Maps. Doesn't put on adjacent road, so doesn't recalculate so often, quickly recognizes my turns and acts accordingly, etc.