yashsingh1/xdaforums huggingface dataset:
[Upgrading, Modifying and Unlocking] 1_Petje:
I did that too, Installed specific .Net4.0 and msxml6.0 followed by lots of automatic windows updates. I haven't installed yet stuff using the flashtool, but I think it works. I also can use the mass storage SD card when I enable that in the phone, but then the phone's the internal flash is not accessible.

The usb vcom port does appear when connecting the phone, and a few seconds later it's gone. That's enough for dealing with the flashtool. When connecting the phone fully booted, the warning triangle in windows device manager appears.

Hey, I truly believe that the info's in the OP are correct, I just can't get to the same situation :p There must be something I did do wrong.
[Upgrading, Modifying and Unlocking] twrock:
Possibly not. I thought you were saying your couldn't get the flashtool to work for flashing the rom update or flashing a new recovery. That is what the OP information solves. But now it seems clearer to me that you are talking about something else.

Just ignore me. ;)
[Upgrading, Modifying and Unlocking] immerzu:
Hi @ll,

anybody can help mee to root my fon Jiayu G2S with:

G2S 20130108-104044

Android 4.1.2

Kernel 3.4.0

installed.

please help me...

thx
[Upgrading, Modifying and Unlocking] miklos13:
Are you sure, it is not rooted? Mine was already rooted, when I got it!
[Upgrading, Modifying and Unlocking] immerzu:
No, it was not rooted. :(

only superuser was installed.
[Upgrading, Modifying and Unlocking] bazilio_lg:
Mine came with the same firmware version and was rooted. Are you sure that you didn't deny all sudo requests in SuperUser?
[Upgrading, Modifying and Unlocking] 1_Petje:
Mine was rooted too when I got it. same official rom.

How did you found out that is unrooted? did you install UncleMobileTools yet?
[Upgrading, Modifying and Unlocking] immerzu:
link2sd, mobileuncletools etc. don't become superuser rights.

edit:

it was rooted, but superuser don't in autoanswer modus!
[Upgrading, Modifying and Unlocking] twrock:
Strange. the rom you have should be rooted. I haven't heard of anyone with that rom that wasn't.

Is there any possibility you ran something that "unrooted" it? What is the history of your phone?

Hmm, maybe re-install Superuser? Seems really strange.

Also, you could follow the instructions in the second post of this thread to flash the whole rom again.
[Upgrading, Modifying and Unlocking] knives69:
MTK6577 CPU Governor Switcher:

http://xdaforums.com/showthread.php?t=2186957

I tried it and works nice with ondemand (and doesn´t breaks deep sleep).

And I found another app to activate 3G 900/1900 bands, in "mobile uncle tools" seems to works (but I heard that it doesn´t work really on 900 only shows it), I will report if something change with this app. If someone need it I will post the app
[Upgrading, Modifying and Unlocking] twrock:
Thanks for that info. I'll give CPU Gov a try.

Has anyone ever seen any help for the "always at 1001mhz when charging" "bug"? (I call it a bug because that's just stupid and probably slows charging significantly.) I attempted to control that behavior though other CPU setting apps, but never saw any change.
[Upgrading, Modifying and Unlocking] iimre:
Anybody knows about a working TWRP image for Jiayu G2S in english? My chinese is very poor :D
[Upgrading, Modifying and Unlocking] 1_Petje:
How are you guys doing on gps? I barely can get a fix when I'm in my car. Need to lay it totally in front of the window to get a fix, in say 10 minutes. So it's not very workable.

I followed the tips by Velzevilnus several posts ago, telling to change the gps.conf file. What's with the *#*#blablaabh*#*# code(s)? why you need "call" it? (I tried it, but seems nothing changed)

One time I had using YGPS 14sats and a quick fix. Then a couple days later it was taking forever to get a fix.

.. thinking about a hardware hack...*
[Upgrading, Modifying and Unlocking] donkarziavelli:
is there a known "charging bug" ? Everytime I try to charge the phone while android is running it doesn't charge. it looks like it does but it stays at the same percentage. It only charges when the android system is turned off.

how do I fix this ?
[Upgrading, Modifying and Unlocking] 1_Petje:
What rom are you running? .. other specs.. tweaks you did? apps running.

I'm still running the original rom: G2S 20130108-104044 and don't have any problem with charging the device.
[Upgrading, Modifying and Unlocking] twrock:
Is it possible this is "perception" only? What I mean is this. When charging, the CPU speed is 1001mhz. So the CPU is running faster and using more energy than it needs to. Add to that, while you are using the phone, the screen is on. More energy used. Add to that, while you are using the phone, you are running "some app" and are using energy. So my point is, maybe the phone is using the line charge to run everything and there is little left to go to the battery. Just a guess.

However, I'm only speculating. What I do know is that this phone charges very slowly. I'm sure part of that is that the battery is 2200 mAh, quite big. But I don't think that is the full explanation. There definitely does seem to be something that is not optimized about the way this phone works/charges when plugged in.

I too am still using the 20130108 stock rom. I believe it is charging while plugged in and running, but I will pay more attention to this question to make sure.
[Upgrading, Modifying and Unlocking] iimre:
GPS reception

My own experience is that the gps is very, very weak. What seems to help a little bit I disassembled just to check and put together again - without any hack - and got better. I suspect that the antenna contacts are bad and any improvement there can lead to a better reception. I plan to get self adhesive copper foil and replace the whole gps antenne.
[Upgrading, Modifying and Unlocking] miklos13:
GPS workaround

I found a workaround (definitely not a solution) for the s*t GPS problem. I bought a used Sirf III Buletooth GPS receiver (it cost abour 10EUR for me), downloaded "Bluetooth GPS" app from googeplay, and now I am using this external GPS receiver with my phone. Navigation works fine, without problems.

Yes, I have now two devices if i need to navigate. But from my point of view it is still a better compromise than having no navigation.
[Upgrading, Modifying and Unlocking] MARKFNZ:
Definitely keen to know more about the other app you found to enable the other 3G bands. I can already select IMT-2000, PCS-1900, CLR-850 WCDMA-800 and GSM-900 in mobile uncle tools, but only IMT-2000 seems to work. I need CLR-850 for outside of the cities in New Zealand. Can you point me to the app and I'll give it a go too.
[Upgrading, Modifying and Unlocking] knives69:
Here I go with my poor english jeje

Compatibilty with G2S, G2H, G2L, G3 ( models with chip 6577 ), Zopos with MTK6577.

You should make a backup with CWM of your rom!

When you install the app, open it and you will see

You must click on 2012/12/17, then click the first button, give SU permissions, then click on the 2º button, and you will be asked (dunno what...), click on right button, and the phone will restart.

You got it!

Try to let only 900 and/or 1900 with mobile uncle tools / Enginner mode MTK / BandMode / SIM 1, and see if it works.

After try if worked you should activate all brands again.

Hope I help u.

https://www.dropbox.com/s/4d7q3xdnqu8drai/900-2100band.apk

Original thread
[Upgrading, Modifying and Unlocking] nightkyn:
Im on LeWa ROM (04/02) so I had problem with GPS too, today I delete this files:

/ Data / misc / mtkgps.dat

/ Data / misc / epo.dat

/ System / etc / gps.conf

- restart phone

- go to setting - location services - turn on GPS, turn on EPO-download, turn on AGPS

- for 1st fix its ideal to be outside(open place)

Thats all....I have done this and now I have fix about 10sec (max up to 20s)
[Upgrading, Modifying and Unlocking] MARKFNZ:
Thanks for the info. The new baseband was applied ok, but unfortunately I need WCDMA 850, so testing 900/1900 is not possible. At least I know now that updating the baseband is a possible fix to get 850, all I need now is baseband for that. I will keep searching and see if I can use the baseband from any other MTK6577 based phone. My Star N9776 works fine on WCDMA 850, so I'm trying to see if I can copy that baseband to my G2S, but so far no luck. Unfortunately just copying the modem.img from N9776 to G2S just results in getting no signal at all.
[Upgrading, Modifying and Unlocking] nightkyn:
or you can easily increase mic values in MTK Tools...
[Upgrading, Modifying and Unlocking] gluto:
I know... But it is always better to improve the source of the signal than to amplify a poor signal....
[Upgrading, Modifying and Unlocking] vuckoks:
hi, does somebody know where i can buy a jiayu g2s touch screen digitizer
[Upgrading, Modifying and Unlocking] jobrima:
Here

http://www.jiayumobileshop.com/jiay...-cell-phone-lcd-display-and-touch-screen.html

Enviado desde mi g2s_jb usando Tapatalk 2
[Upgrading, Modifying and Unlocking] miklos13:
Hi,

there is a guy in hungary, who did a similar modification. He also put an addtional antenna on the back of the phone. If the back is mounted, the two antenna parts are connected, and the signal is even more cleaner.

Here is his post (you can use Google translate for it, or I can translate it to english, if you need it):

http://mobilarena.hu/tema/android_dual_sim_ket_sim_okostelefonok_topikja/hsz_23235-23235.html

Could you please upload a photo, where we can see, how did you connect the copper foil to the GPS antena connector of the motherboard?

M.
[Upgrading, Modifying and Unlocking] 1_Petje:
Hey,

I'm very interested in "GPS fix in the making" that is being developed here. And when I find available time I accompany. For now research: Here is how our colleagues at HTC did it: HTC Desire HD These guys did find enough space to solder a solid-core wire between the antenna contact points.

Maybe we have to look for a simular solution here. At the chines jiayu forum (bbs.ejiayu.com/forum) I found a picture of the inside, behind the screwed on body part. At the right you will find the two GPS antenna contact points (red arrow). Please do not pin me on it. But from what I've been seeing at the Hungarian site and other pictures, I'm pretty sure this must be it.

xxxx://i44.tinypic.com/2ligevt.png fill in "http" where xxxx stands
[Upgrading, Modifying and Unlocking] cmarco86:
???

I bricked my phone. I did a firmware update. My phone will not turn on. The computer recognizes the phone if it is connected. How can i do?
[Upgrading, Modifying and Unlocking] twrock:
I suggest that you first be sure which hardware version of the phone you have. When did you buy the phone? Did you make a note of the original firmware number prior to trying to flash the rom?

Once you know which hardware version you have, then you can choose which official rom update is to be used for your phone (the http://xdaforums.com/showpost.php?p=37404357&postcount=2 or the 20130306 official rom update). Then you can follow the instructions in the second post in this thread for how to flash an official rom.

You must not try to flash the wrong rom on your phone.

So don't do something you aren't sure of.

Good luck.
[Upgrading, Modifying and Unlocking] arkas5:
Stay away from minideal.net

I returned (as requested by e-mail) my faulty G2S to the address mentioned as "Return Mail Address" on the original package by minideal.net.

Once I sent it, they claim that I should't have sent it there and provided a different mail address. Despite the fact that my registered package to them was picked-up, they don't acknowledge the delivery and I lost my money...

On top of that, they do not respond to any of my e-mails. Really bad experience !!!

DO NOT TRUST MINIDEAL.NET
[Upgrading, Modifying and Unlocking] cmarco86:
Thank you for reply...

I bought the phone 02/2013. I did not do the backup. How to know the hardware version of my phone? Where to download the full rom?
[Upgrading, Modifying and Unlocking] twrock:
Disclaimer: I am only offering my opinion, which might be wrong. I can not be responsible for what happens if you follow my advice.

I think that if you purchased your phone in February, it will be the early hardware.

If that is true

, you will want to follow the instructions in the second post of this thread: http://xdaforums.com/showpost.php?p=37404357&postcount=2

Read all of the instructions very carefully! Make sure you understand EVERYTHING before you start. Don't skip any steps. Do them in order, the way they are written. Everything you need to know should be in that post, including the links to get the software/firmware you need.
[Upgrading, Modifying and Unlocking] troje:
Hi all,

Congratulations on the magnificent forum, which I got a lot of information, very helpful and knowledgeable about the G2S. I have my gps catches Jiayu G2S, but I can not share because I have not yet allowed to put external links.

Ah! Visit .... movilesdualsim.com / smartphones with MT6577/Jiayu G2/Antena Gps Jiayu G2S

Regards.
[Upgrading, Modifying and Unlocking] twrock:
I think this is the link: http://www.movilesdualsim.com/foro/threads/30299-Antena-Gps-Jiayu-G2S
[Upgrading, Modifying and Unlocking] troje:
Yes, it's that. Thanks twrock :good:
[Upgrading, Modifying and Unlocking] iimre:
On what based the design and scaling of this antenna? Experimental or other?

There is more place there to make a bigger antenna. Can it improve performance or not?
[Upgrading, Modifying and Unlocking] petymeg:
Michrophone volume

Hi!

I have get a Jiayu G2S. It is near perfect phone, but I have a problem with the michrophone. How can I increase the volume of the microphone? My partners are complaining that the volume is very weak...
[Upgrading, Modifying and Unlocking] jobrima:
Sorry screenshot in Spanish

Enviado desde mi g2s_jb usando Tapatalk 2
[Upgrading, Modifying and Unlocking] twrock:
From earlier in this thread, you can try hardware or software fix:

http://xdaforums.com/showpost.php?p=40458040&postcount=237
[Upgrading, Modifying and Unlocking] p83p:
only jiayu logo after rebooting

***edit***

I solved it by flashing official rom wchich enabled phone working again and then installed LeWa via uncle tool.

******

Hello,

I updated to last official ROM (my G2S is 20130306-143807).

After restoring backup from Titanium Backup, I restarted phone and I see only jiayu logo and then JIAYU text. Nothing else happens. Phone can´t be switched off, restarted - anything...Only after batery remove it switches off.

I decided to use LeWa ROM. So I used “Unofficial” Guide to Flashing the Jiayu G2S ROM guide.

But after listing scatter.txt from LeWa, it says "Error: Initialize scatter file failed. Please check the scatter file name you load is legal".

The only related post to this error I found at needrom which says "you must install with CWM scatter bug in V 03.08". But I´m beginner and don´t know what does it mean.

Can anyone help me an tell me what I can do now?

Thank you very much in advance.
[Upgrading, Modifying and Unlocking] petymeg:
Thank you! It works!
[Upgrading, Modifying and Unlocking] picatostas:
Hi, I bought g2s 27 th april, and since ive been using it my battery rns out quickly and Takes ages to be fully charged. And i dont use it too much, twitter, WhatsApp, dolphin, sometimes music. Ive fixed the red led problem reffered to deep sleep mode. I also fixed mic low volume problem. After speaking with the seller about the problem I got a free battery, its being shipped. The thing is That i want to discard hardware of software problem (this one should be solved by flashing a new rom, official or unofficial, whateva), you can check my compilation rom number and battery and cpu usagge stats to give you as much information as its needed. The screenshots are in spanish because im from spain, but relevant information is clear.

Someone please give me a solution.

Cheers

Enviado desde mi G2S usando Tapatalk 2
[Upgrading, Modifying and Unlocking] jumami:
I have the same problem when the battery is charged

Have you found the solution?

Thank you.
[Upgrading, Modifying and Unlocking] picatostas:
How the hell has the cwm recovery. Img to be called?

Its on the root directory of the sd.

I tried

"CWM 6.0.1.5.img"

"CWM6.0.1.5.img"

"CWM.img"

"recovery.img"

With uncletools when i select the option install recovery from sd card it doesnt rocognize the recovery img with none of theese names :( someone put som screenshots of the process please :)

Regards

Enviado desde mi G2S usando Tapatalk 2
[Upgrading, Modifying and Unlocking] twrock:
No screenshot, but the method is very simple to explain.

The only naming problem I have found is if the image file has a space in the name. My Recovery image file is named CWMG2Srecovery_6.0.1.5.img and it works just fine. (I added the underscore because it had a space originally and didn't work.)

That file is in the root directory of the SD card.

Start MobileuncleTools and tap "Recovery Update".

At the top under "Recovery file in SDCard" I see the CWMG2Srecovery_6.0.1.5.img file. Tap on that file name.

The "Are sure flash recovery" warning pops up with the Recovery filename listed, I tap OK.

The popup granting Superuser permission shows up for a second.

The "Into Recovery Mode" dialog pops up. Tap OK, and it boots into CWM Recovery.

So two things I can think of. Are you sure that file name has no spaces? Are you sure that MobileuncleTools has SU permission? Other than that, I can't think of any other reason it isn't working.

As a last resort, you can try to use the second method described in the first post of this thread. It uses the MTK flashtool, and is much more complicated, but I have used that as well, and it works. But if you do that method, be sure of what you are doing.

Good luck.

Edit: One more question. What is the rom build number on your device? (under Settings/System/About phone)
[Upgrading, Modifying and Unlocking] picatostas:
It worked with "recovery.img" which is wierd cause you say that your recovery was called CWMG2Srecovery_6.0.1.5.img

The phoned shuted down nd then when i turned it on CWM appeared, at least it worked

Im going to flash the lastest rom because my waste of battery is too damn high without using it too much. In the battery stats android system Takes 60% of the battery waste, and the battery lasts 7/8 hours and it takes to be fully charged 6 hours

G2S 21230306-143807 is the compilation number

Enviado desde mi G2S usando Tapatalk 2
[Upgrading, Modifying and Unlocking] twrock:
The actual name of the file is not important. Only that it has no spaces in the name. You should be able to name it xyz.img, and it still should work.

For future reference, your rom is the newer official Jiayu rom. The guide I wrote for how to flash an official Jiayu rom talks about the 20130108 rom. That is for older versions of the phone (like I have).

Glad you got it working.
[Upgrading, Modifying and Unlocking] picatostas:
Yeah it works but battery runs out sooo quickly and i still dont know why xD

Enviado desde mi G2S usando Tapatalk 2
[Upgrading, Modifying and Unlocking] twrock:
My use of the phone during the day is fairly light. Data connection is off. Wifi is always on. I check some email. I make some calls. I look up some data like addresses and read some documents. That's about it. At the end of the day, I'm almost never below 50% battery.

Also, according to CPU Spy, my phone spends the majority of time in deep sleep. It is at 1000mhz a lot of the time because that is where it is during charging (at night). It has a small amount of time at 250mhz while I am using it.

After checking the battery stats, what is using the most for you? Are you actually using the phone for something (games, music, apps?), or is it just draining on its own even while the phone is off?
[Upgrading, Modifying and Unlocking] picatostas:
I give to the phone normal use, WhatsApp, twitter, tapatalk, and sometimes music, i dont play games and I even use battery doctor to enlarge a bit this agony.

And it stills waste too much.

The two first pics are from yesterday and i was studying at my uni so... XD it engages sleep mode but battery doesnt last as it should. I told the problem to the seller and they have sent my a new battery i suppose ill get it friday 24th... Until then i want to know if the problem comes from the phone or not. The third pic is while the phone was charging, it took more than 2 hours with flight mode!! Without it Takes like 5 hours. And most of time, the biggest percentage of battery waste is from "Android system"

Enviado desde mi G2S usando Tapatalk 2
[Upgrading, Modifying and Unlocking] picatostas:
Look, what ive said about "android system" battery consume, 3 hours and a bit and 25% of battery, aint weird, really?

Enviado desde mi G2S usando Tapatalk 2
[Upgrading, Modifying and Unlocking] twrock:
That is very different than my phone. About 11 hours today on battery so far:

Cell standby 27%

Wifi 27%

Phone idle 25%

Voice calls 18%

Screen 4%

Android OS 2%

I don't know what is draining your battery, but I'm still over 60% battery at this time, and Android OS only used 2%!

You could do a backup, then system reset (to get rid of everything) and then test only the basic system without any other apps installed and see what is happening. It doesn't seem right to me.
[Upgrading, Modifying and Unlocking] picatostas:
How can i totally erase system?

Enviado desde mi G2S usando Tapatalk 2
[Upgrading, Modifying and Unlocking] 1_Petje:
Go to Settings, scroll down a bit. Tap Backup & Reset. Tap Factory data reset.

Your phone will boot back completely stock, and in Chinese language. I think you even have to install super user. I did it once before, when I lost my GooglePlay acces.

ps. battery talk: I completely agree with Twrock, Normally I go about 2 days at one charge. I have about the same usage. Theoretically charging should take 4.4 hours: 2200mAh/500mA usb current.
[Upgrading, Modifying and Unlocking] picatostas:
I ve actually done wipe data twice, and installed a new rom, but it was installed as an update, not as a clean new instalation... :s what more can cause battery waste?

Enviado desde mi G2S usando Tapatalk 2
[Upgrading, Modifying and Unlocking] twrock:
So is your rom an official Jiayu rom, or some other third-party rom? If i is a third-party rom, then that might be your problem.

If you really want to be sure you have a "factory official" rom without any modifications, you can look at the second post in this thread for the detailed instructions. But you should

not

use the 20130108 rom I give the link for in that post. You need the newer rom from March 2013 (I forget the day, but I think it is the 20130306 rom).

Good luck.
[Upgrading, Modifying and Unlocking] picatostas:
G2S 21230306-143807 is the compilation number

And it is the rom that come from factory, i mean, the one that was installed in the phone when i recieved it, im afraid that itd be a hardware problem, but none has reported a problem like that, this is kinda weird

Enviado desde mi G2S usando Tapatalk 2
[Upgrading, Modifying and Unlocking] twrock:
Well, I don't know what else to think. Sometimes battery drain is a bad app. But if you have done a factory reset, not installed any apps, and it still is draining, I don't know why.

I ended the day today at 82% battery remaining. But I must admit that data and wifi were off all day today, and very little use of the phone. But Android OS only used 2% again.
[Upgrading, Modifying and Unlocking] 1_Petje:
Is your phone getting hot? Mine does, but only on heavy use, for example navigating using the weak GPS. A fast battery drain has to lead to more heat dissipation.

You also can try running your phone for a day with only one Sim and no SD card. Also try a day with the other Sim. Mayby one of these cards is bad.

How is your provider signal? 3 to 4 stripes, or just one none all the time? at a bad signal the phone is polling more often and with more power.

just some thoughts..