yashsingh1/xdaforums huggingface dataset:
[Upgrading, Modifying and Unlocking] picatostas:
The process that is draining my battery is called "surfaceflinger" even with a new rom, yesterday the battery problem seemed solved but this morning after unplugging the phone from charging, on battery stats pressing "refresh" button fast, ive seen how "android system" label quickly toggled to " surfaceflinger" and then back to "Android system". Can Someone tell me dafuq is that? And of course if can it be solved?

Enviado desde mi G2S usando Tapatalk 2
[Upgrading, Modifying and Unlocking] Velzevilnus:
MIUI Fixes everything!

I installed MIUI ROM (3.2.2) and GPS is working Perfect even without any internet connection but it takes like 5mins to lock satelites and the way to fix the mic is from engineering mode. MIUI got some silly bugs tho, like Camera was not working and i had to instal another program like Camerazoom FX in order to have camere and another bug is if you try to delete multiple contacts sametime it crashes but in general everything is working like a charm :)
[Upgrading, Modifying and Unlocking] 1_Petje:
Okay, thats nice to hear. I'm sceptical about the GPS. How often do you really use GPS? How many whats satellites do you pick up, and whats the Signal Noise Ratio?
[Upgrading, Modifying and Unlocking] joepaps:
how did you install it? did it run smooth on g2s?
[Upgrading, Modifying and Unlocking] augustouser:
Jiayu has MHL tecnology or similar?

How can I plug my G2S on TV?
[Upgrading, Modifying and Unlocking] lo_ol:
does anyone know where i can order a back cover for the g2s?

not a battery cover but the one below that has the camera glass in..
[Upgrading, Modifying and Unlocking] mydiscworld:
Hi, I've checked most of the pages in this thread but haven't come across anyone asking about 3G in Ireland.

I'm on O2 network but not picking up 3G at all. Only have the phone 6 weeks or so.

On version 4.1.2 of the G2S.

Any ideas?

Many thanks in advance
[Upgrading, Modifying and Unlocking] augustouser:
aliexpress.com
[Upgrading, Modifying and Unlocking] ninjataki21:
I was pretty stupid and chose the easy way of getting a phone (Zopo C2) with the atrocious Etotalk Mod rom. Big mistake its crap and now I need to mess around getting rid of it and replacing with something stable
[Upgrading, Modifying and Unlocking] abaggie:
Flashed miui V4 (and V5) but with both I have 2 problems.

1. After flashing MIUI the phone keeps asking for PUK code instead of pin and you can't switch this (off).

Workaround is disabling SIM-LOCK in STOCK rom and then flashing MIUI.

2. Bigger problem is NO-SERVICE issue. When the phone goes in to lock screen and you unlock it again..at the topleft there is ''no service'' so the phone hase no service if it goes to sleep.

Searched internet there is a fix for no service issue/bug for MIUI 1.11.18 but this does not work on G2S. Can someone help me fix this? Tried installing ROM couple of times, wipedata, factory rest, wipe dalvik,cache nothing works :(

Fix for MIUI 1.11.18 NOT working/compatible with G2s:

http://xdaforums.com/showpost.php?p=19050998&postcount=835
[Upgrading, Modifying and Unlocking] twrock:
Well, I don't recommend Jiayu either. :mad:

I guess buying from the low-tier Chinese market is still too risky.
[Upgrading, Modifying and Unlocking] baniko2:
video sound volume problem

the sound volume when it gets video is very very low!

some idea?

Sure is not a hardware problem, because calls sound normally.

Is a matter of some settings, but where?

Maybe someone who knows the use of mobileuncle tools can help.
[Upgrading, Modifying and Unlocking] 1_Petje:
Hi, I'm in Holland, and my 3G works excellent. too bad it hasn't got 3,5G (hsdpa) so i-net speed is not quite high. Anyway, about yours.. Have you tried putting your SIM card in the other sim-slot? only one of the two supports 3G. Then of course there are some Android settings, but I guess you've already tried that.

edit:

Seems that if you go deep enough into the wireless & network settings, somewhere you can change the network type (mode) that is being used. I've changed it to "auto mode"
[Upgrading, Modifying and Unlocking] luchtgitaar:
Does Google Hangouts work on your phones? I'm getting a direct force close.
[Upgrading, Modifying and Unlocking] abaggie:
Works here...im running Miui though, try to reinstall the app or update to newer version.
[Upgrading, Modifying and Unlocking] ngnl:
governor switch

Hi, i'm also on the 20130306 rom, with an awful high battery drain.

I recently found this program: http://xdaforums.com/showthread.php?t=2186957

Which is a governor switch for the MTK chip.

On the "ondemand" setting i'm getting almost 2 days in stead of 1 day uptime.

However it still doesn't go into deep sleep.
[Upgrading, Modifying and Unlocking] knives69:
Try to use CPU Sleeper
[Upgrading, Modifying and Unlocking] ngnl:
CPU sleeper only hits 1 core. So it's a half way solution...

And not free to try if it works.

Thanks though for the tip. Who knows, perhaps i will try it.

---------- Post added at 04:09 PM ---------- Previous post was at 03:57 PM ----------

Can one flash the fix within mobileuncle?

Unfortunatly i also can't flash the CMW recovery img from within Mobileuncle (img on sd card does not show up in the list) and it somehow screwed up my recovery as i flashed a incorrect recovery.

Still looking for a correct scatterfile...no luck so far.

Seems this only occurs with the (my) 20130306 rom

No apps getting killed here or trouble with the notification though.
[Upgrading, Modifying and Unlocking] abaggie:
You can flash this with SP Flash Tool its stock rom with chinese cwm recovery.

Stock rom with CWM: http://www.speedyshare.com/k7Xf3/G2S-with-Chinese-CWM-Stock20130306.zip

CWM:http://i.imgur.com/AEsizbR.png
[Upgrading, Modifying and Unlocking] ngnl:
YES, it worked! Deep sleep....at last. My G2S can finaly "rest" now.

Thanks for the help, two thumbs up! :laugh:
[Upgrading, Modifying and Unlocking] abaggie:
Nice, you can also flash the ''red light bug'' mod/patch, when the G2S sometimes blinks or uses red light led/notification the CPU stays at 1Ghz all the time so this drains the battery heavily. You can download it here: http://www.speedyshare.com/Qv2zZ/JiayuG2S-LEDPATCH-20130306-143807MOD.zip flash it trough CWM.
[Upgrading, Modifying and Unlocking] iimre:
I have rom version 20130109-104044 on my phone. The newer 20130306-143807 version what improvements provides? Does it worth to upgrade?

---------- Post added at 01:47 PM ---------- Previous post was at 01:32 PM ----------

Now, if you want to change that chinese cwm to english, you can find here CWM and TWRP as well. You can install them by Mobile Uncle Tools.
[Upgrading, Modifying and Unlocking] ngnl:
Between the two G2S, one on 20130109 and one on 20130306, i can't find any difference in performance nor in the GUI of android.

But it could be that there is some hardware change which makes the 20130306 rom incompatible for the G2S which comes standard with the 20130109 rom.

On needrom.com they mention following on the 20130306 rom: This ROM is just for Mobile purchased after January 8, 2013 with new chip Samsung

So unless you still have screen problems i would not advise to upgrade blindly without doing some research.

[MENTION=4437819]abaggi[/MENTION] Thanks for the recovery's!
[Upgrading, Modifying and Unlocking] xtam:
Hello, a colleague of mine have this phone, jiayu G2S and he misfortunatelly edited build.prop (on stock firmware without custom recovery). Now his phone is in bootloop mode, can not fully boot.

What can he do to quickly fix it?

he told me that he entered recovery but everything is in chinese....

thanks in advance :)
[Upgrading, Modifying and Unlocking] abaggie:
Wipe Data/Factory reset in recovery wil reset it back to stock.

The third option/line in recovery: http://i.imgur.com/AEsizbR.png
[Upgrading, Modifying and Unlocking] iimre:
O.K. But if a G2S came out with ROM 20130109, that should have been bought after January 8. Am I wrong?

Which chip is made by Samsung? How can I check that?
[Upgrading, Modifying and Unlocking] ngnl:
It seems to me that only the G2S with stock 20130306 rom are equipped with the new hardware.

The shipping date is not so important, the phone could be on stock a few months before it was sold to you.

The SoC only changes in BT-, GPS-, WiFi-chips. The proc. is always the MTK6577T. Apparently baked by Samsung. I do not know how to check this directly.

For what it helps, here some specs regarding the new G2S 20130306 stock rom hardware (from MobileUncle):

Bluetooth Chip Id: MT6628

Wifi version: chip = MT0 FW VER = v1.1

i could not find the GPS chip identification...

Good Luck.

And let us know, if you do flash the new rom, if it runs smoothly.
[Upgrading, Modifying and Unlocking] MMartini65:
The 20130306 ROM is backward compatible to all models of G2S but the phones that comes from factory with 20130306 ROM have a new BT/WIFI HW chip and cannot use the previous 20130109 ROM.

So, if your phone comes from factory with 20130306 ROM, DO NOT UPGRADE to custom ROM derived from stock 20130109.
[Upgrading, Modifying and Unlocking] iimre:
Until I'm not sure to avoid bricking my phone, I don't upgrade the ROM. I try to collect more info to identify the HW differencies.

On the other hand, frankly said beside the known GPS weakness, I don't have any other problems. O.K. it would be nice to have JB 4.2, but it seems that Jiayu abandoned this model. It's a shame because it is one of the nicest phone by my opinion.
[Upgrading, Modifying and Unlocking] mitar1982:
I bought this phone to my sister. Everything is fine except battery consumption. Processor is stuck on high frequency almost all the time. Build number is G2S 20130306-143807. I hope there will be update of official rom soon, I am little afraid od trying and testing unoficial roms and recoveries.
[Upgrading, Modifying and Unlocking] abaggie:
You can reflash the rom with SP Flash Tool its the offical stock rom with chinese cwm recovery.

Stock rom with CWMR Touch: http://www.speedyshare.com/k7Xf3/G2S-with-Chinese-CWM-Stock20130306.zip

CWM:http://i.imgur.com/AEsizbR.png

After you flashed the stock rom let it boot. Download red led fix http://www.speedyshare.com/Qv2zZ/JiayuG2S-LEDPATCH-20130306-143807MOD.zip and copy to your phone.

Shut it down start in in recovery ( hold volume + and power) choose recovery enter/confirm with volume -

Now choose second option install zip SD card then first option search the LEDPatch confirm install and reboot.

Now your phone can go in deepsleep and lower the CPU frequency because this is a bug and can be resolved with LEDPATCHMOD.
[Upgrading, Modifying and Unlocking] mitar1982:
Thanks, I will try this when my sister give me her phone to play with it :)
[Upgrading, Modifying and Unlocking] luchtgitaar:
Yes, thanks. With the latest update received a couple of days ago it works like a charm.
[Upgrading, Modifying and Unlocking] luchtgitaar:
Edit: probaly need cwm. Sorry for inconvenience.

Edit2: Fixed it. Thanks.

So what does this patch do? It states to disable auto brightness and also turn off red led lights? Missed call is now green, but why disable auto brightness?
[Upgrading, Modifying and Unlocking] grafeno:
I have a G2S 20130306 who did not work well the microphone. No sound volume problem, because I have made microphone changes to values ​​through MobileUncle Tools we can see in this forum, and remains exactly the same, but it is a deafening noise problem for my listener. I hear them perfectly, but they listen me with a sound cable interference.

This is what in the shop say to do, but I think that is not the solution:

"Our technical staff suggest you can go to recovery to clear the data and try it again"

Anyone else happened?

Thanks
[Upgrading, Modifying and Unlocking] windragon:
Check with which version of mobile uncle you've done the changes, use the latest one.

Redo the configuration as wrote on the guide here on xda.

Then close all tasks and reboot the phone.

If possible do it as first thing before install any kind of software, in particular battery managers.

From my little experience it might solve your problem.

If not; try to reflash it with the stock rom change the language to your one then redo the configuration with mobile uncle (don't forgot to reboot).

If the problem is still there as last try put from 2 to 4 values the volumes suggested on the guide.

If this last try don't give you a solution, may be an hardware problem.

Let us know

About:

I've the same battery problem, To fix it I must flash the CWM-Stock20130306.zip even if I've build G2S 20130108-104044?

Thanks

Windragon
[Upgrading, Modifying and Unlocking] abaggie:
Links for G2S (how to First post & second post)

SP Flashtool + Drivers + Scatter

SP Flashtool(3.12) + Drivers + Scatter G2S

Drivers Windows 8x64

Newer flashtool (v3.1316.0)

Drivers G2S

Recovery's

Stock Recovery (mega)

CWM 6.0.1.5 (dropbox)

CWM 6.0.1.5 (mega)

CWM 6.0.2.8 (mega)

TWRP v.2.4.1.0 (dropbox)

TWRP v.2.5.0.0 (mega)

ROM's

G2S JB - 20130109-104044 ROM SP & CWM

20130109-104044

SP

Flash G2S (mirror link)

20130109-104044

SP

Flash G2S (official link)

20130109-104044

CWM

Flash G2S (mirror link)

20130109-104044

CWM

Flash G2S (official link)

G2S JB - 20130306-143807 ROM SP & CWM

20130306-143807

CWM

Flash G2S (mirror link)

20130306-143807

CWM

Flash G2S (official link)

20130306-143807

SP

Flash G2S (mirror link)

20130306-143807

SP

Flash G2S (official link)

Patch

Redlight Deep Sleep bug (Flash through recovery)

20130109 better auto-brightness & redlight fix G2S

20130306 better auto-brightness & redlight fix G2S

Other

Lewa OS (EN/CN) (official link)

Gapps for Lewa OS)

Needrom(official link)

592zn.com Chinese forum G2s

Jiayu official forum G2s

Jiayu official product pageG2s
[Upgrading, Modifying and Unlocking] iimre:
Nice collection. Thx.

Here you can find a ROM which is to be installed from SD card via "update system" app, as the included doc says (google translate is your friend). Maybe a good option without sptools and custom recovery.
[Upgrading, Modifying and Unlocking] Sokko:
My G2S has a problem with GPS signal too. After reading this thread I decided to try hardware mod.

First of all I dismantled the phone. Its very easy to do. All you need is one very small philips (PH 0) screwdriver and piece of hard and thin plastic (I used plastic knife)

Remove 6 screws on the back and open back cover with plastic knife. GPS antenna is on the top right corner. It looks like copper foil with some glue to keep it in place. Here is the photo:

I am 100% sure that one is for GPS because my phone couldnt find any satellite signal for almost 30 minutes.

To remove it you must carefully peel it of from every corner. When you finish external side you must peel of its connector on internal side of back cover. Once everything is free it is easy to take it out. Another photo:

Than I made test antenna from thin aluminium foil for kitchen use. This was just temporary antenna because the foil is very thin, sensitive and difficult to fix in right place. I am looking for thicker alu or, even better, copper foil for permanent solution.

It looked like this:

and internal side of back cover:

There is no special reason for this shape of antenna. I dont have any knowledge about design or required parameters. I just took a scissors and cut the shape that seemed logical at that moment. I am sure that the result and accuracy will be much better if someone made right design.

Both test were done on same spot - on my window. The weather was nice and clear.

First, test with original antenna. You will notice the time - this was filmed after I made my alu-foil antenna because I couldnt wait ti try it so I forgot to record the performance with factory antenna. Anyway, here it is:

[YOUTUBE]https://www.youtube.com/watch?v=H9vmXL1vEBk[/YOUTUBE]

It couldnt lock more than 5 satellites or reach more than 15m accuracy.

Now, take a look how it works with my design:

[YOUTUBE]https://www.youtube.com/watch?v=NJwld072HN8[/YOUTUBE]

Frankly speaking, I am very surprised with the difference. If someone wants to recommend a better shape I will be happy to test it once I find suitable material. Actually, I can try to make it again from same thin foil but I dont guarantee that I will be able to reach exact measures.
[Upgrading, Modifying and Unlocking] 1_Petje:
Wow! very impressive, and opening doors for even more improvement. Can you confirm that the original antenna has also got any kind of O- shaping in it or is it just a piece (one piece) of copper tape?

from your pics, it looks to me there are hanging some weird useless stick outs on the antena-sticker. for example the part that lies against the side/corner of the phone and also a part that goes around the screw hole. Normally these antennas have some sort of O-shape or a S-shape like the antenna in bottom part of the G2s.

another question: Where did you make your movies/tests? inside a building, or outside with a perfect clear sky and no trees nearby..
[Upgrading, Modifying and Unlocking] hukerrs:
Great work!

Have you tried any real world application? Car navigation or sports tracking?
[Upgrading, Modifying and Unlocking] geronimoid:
screen shake

Hi guys,

Good to see progress being made on the GPS !

I'm posting because I've been having the 'screen shake' problem since I got my phone two months ago. It's finally annoyed me to the point that I'm either gonna try to fix it or sell the phone.

In your opinions, do you think if I buy a replacement screen it will fix the problem, or is it an issue with some other component of the J2s?

Thanks in advance
[Upgrading, Modifying and Unlocking] twrock:
As far as I know, there is a one year warranty on this phone. Jiayu replaced my phone because of that problem. Supposedly the online retailer I bought it from would have helped me with the return, but I was able to deal directly with Jiayu because I speak Chinese.

I don't know what the cause is of the "jump screen" problem, but I assume it is hardware. If so, replacing the screen might do the trick.
[Upgrading, Modifying and Unlocking] Sokko:
Sorry for late reply. My laptop charger died :(

Whole antenna is shown in the photo. Thats just one piece of copper tape - no O or S shape.

The phone was placed under the window in my living room, on the the east side of my house (if thats important). The weather was clear and no trees nearby.

I didnt made any progress yet because I had no time to look for better, thicker foil.

I was hoping that someone will recommend better shape for antenna. I will try to make multiple S shape and make the test.

Anyway, it will take samo time because its not my first priority. I have 2 more phones which I can use for navigation.
[Upgrading, Modifying and Unlocking] matyrock:
Hello

Hi, I'll buy a Jiayu G2S, and I'm viewing a few ROMs for this phone... This phone have unofficial ROMs?

Thanks,

Sorry My Bad English :(
[Upgrading, Modifying and Unlocking] iimre:
Yes. Here.
[Upgrading, Modifying and Unlocking] 1_Petje:
GPS modding

Ok, Did some GPS modding too,

I noticed (like Sokko) that the original antenna, is just one piece of random-shape-like copper tape. The two terminals to from the PCB, just are directly short-circuited by the tape. It seems to me that the antenna hasn't got any Ohms resistance or Capacitance or Inductance.

http://oi44.tinypic.com/1j0llz.jpg

http://oi40.tinypic.com/2meeji8.jpg

First I just leave the original antenna in place, but disabled it by putting a little tape over it. Then I connected a single string of a flexible-core wire to one of the two terminals, made an one inch O-shape, and connected the other end to the other terminal. Then I powered on the phone, and yes the signal was stronger, but the antenna was not mounted tight to the phone, but hanging free in the air.

http://oi44.tinypic.com/2evb2ae.jpg

Then I made a similar one, but then with the length of about 7 inches and attached both ends to a PCB terminal each. The signal strength then was about the same, maybe a little higher.

Then I made another one but then with a length of about 20 inch and came to the conclusion, Size does not matter :P (bigger is not better).

So then I started winding the wire to a two turn coil, and noticed a slightly stronger signal. After that I took a bit of coilwindingwire (with insulation on it) and made a multi-turn coil with a diameter of about 2 inches. This also didn't made it all much better.

http://oi41.tinypic.com/104p7is.jpg

http://oi44.tinypic.com/2rfbfyd.jpg

For so far I tested, the biggest influence is the antenna sticking tight to the phone, instead of hanging in the free air is the problem. The highest signal strength SNR I found was 41, in GPS-test app. Can someone with another (better gps) phone confirm that this signal rate is still pretty low???

http://oi40.tinypic.com/2s9eqde.jpg

Next for me is try some other antennas, I've read about a Dipool-antenna, where the two connection terminals aren't physically connected. and want to experiment with the length, and sizes more to match the wavelengths of GPS: L1= 1575.42 MHz and L2= 1227.60 MHz (googled)

The last pic, is how I used the phone for a couple of days. Signal strength is not significant better
[Upgrading, Modifying and Unlocking] matyrock:
Thanks

Very very thanks you :D

I clicked "Thanks" button for you :D

(Sorry bad english :( )
[Upgrading, Modifying and Unlocking] CapSizer:
Microphone hardware issues

I won't bore you with the full story of my phone's journey back to China and then back to Cape Town again by ship, not to mention the 2 months sitting on a shelf in Shenzen (used the wrong return address!) Suffice is to say that I wasn't sending it back for repairs after that epic, especially as I've since bought a Nexus 4. So I started looking into the intermittent microphone (mine went completely dead) myself.

It turns out that the problem is being caused by a poor contact at the bottom of the phone. When you insert the USB charger, it is possible to cause a bit of distortion to the circuit board at the bottom. I think my problems started when I inserted the charging cable while the phone was wearing the rather poorly fitting standard soft "bumper" cover, which put too much load on the connector. I've now inserted a piece of plastic between the plastic frame (had to unscrew the 6 small screws, there goes the warranty ...) and the charging socket, and now there is less movement, and consequently the microphone is making proper contact again. Will let you know if this "fix" continues working.
[Upgrading, Modifying and Unlocking] lelepanz:
Anyone has the camera patch downloaed from pda forum?
[Upgrading, Modifying and Unlocking] arko.2000:
please upload the boot.img from the stock rom. I need it very urently . plz plz.«»«»«»«»
[Upgrading, Modifying and Unlocking] abaggie:
You can download it here UPDATED LINKS

http://xdaforums.com/showpost.php?p=42456644&postcount=311&nocache=1&z=6509320007171482
[Upgrading, Modifying and Unlocking] geronimoid:
Here's a question for you all :o

My G2S was running fine and dandy until I thought I would install CWM. Basically I wiped the dalvik (not sure why I did that) and installed the file, through mobileuncle, that was posted earlier in this thread.

As soon as I did that, I had the 'screen jump' problem. Aaaghhh :eek:

This makes me think that the screen jump isn't a hardware issue after all!
[Upgrading, Modifying and Unlocking] MMartini65:
The wire length is important and must be related to the wavelength of the GPS signal.

The GPS signal wavelength is 190.5 mm and good wire length could be: 190 mm or 95 mm (half wavelength) or 48 mm (1/4 of the wavelength).

Also the shape is important, but you can try if, using these wire lengths, the signal is better.
[Upgrading, Modifying and Unlocking] augustouser:
Me too...
[Upgrading, Modifying and Unlocking] geronimoid:
Jump screen fix

G2S JUMP SCREEN / SCREEN SHAKE FIX:

1. Install the attached recovery.img through mobileuncle

2. Reboot and enjoy the lack of jump screen :good: