I guessed so as well, but thought it worth to ask those who already have it. Anyhow GG doesn't protect from breaking when dropped, but very resistant to scratches.
Jiayu G2S - "unofficial forum"
- Thread starter twrock
- Start date
I guessed so as well, but thought it worth to ask those who already have it. Anyhow GG doesn't protect from breaking when dropped, but very resistant to scratches.
trnnt the
Yesterday I did some playing with the phone. I found that my unit does NOT have the ghost touch issue. It's running the 20130108-104044 firmware. I guess it's unit of a later batch. Geekbuying sent it to me about three weeks ago. So i'm very glad with that.
I am experiencing troubles with connecting to wifi. I've tried two routers, G2s finds AccesPoint and starts builing up a connection, but then fails after a minute or two. says connection is to poor. The signal is about to 100%. Router says in logfile: dhcp failed. "because RX deauth req"
Tonight I will try different authentication types and passwords, but I don't think it's gonna solve.
Yesterday I did some playing with the phone. I found that my unit does NOT have the ghost touch issue. It's running the 20130108-104044 firmware. I guess it's unit of a later batch. Geekbuying sent it to me about three weeks ago. So i'm very glad with that.
I am experiencing troubles with connecting to wifi. I've tried two routers, G2s finds AccesPoint and starts builing up a connection, but then fails after a minute or two. says connection is to poor. The signal is about to 100%. Router says in logfile: dhcp failed. "because RX deauth req"
Tonight I will try different authentication types and passwords, but I don't think it's gonna solve.
working almost perfect
I added the LEWA firmware (updated 02 april 2013) and everything is working perfect exept the GPS! It searches only for ASIAN satellites and i have tried anything but found none soluteion, i think only that it will work if they add the setting in the ROM. So if anyone found anything plz tell.
I added the LEWA firmware (updated 02 april 2013) and everything is working perfect exept the GPS! It searches only for ASIAN satellites and i have tried anything but found none soluteion, i think only that it will work if they add the setting in the ROM. So if anyone found anything plz tell.
I am aware that there are ways to optimize the satellite search for other locations. However, I don't know where to get the list from for each area. (I don't have this problem because I am in Taiwan.)
Here is a link that includes some discussion of the issue. It is not about this phone, but you will at least have some idea of where to start to look for your answer.
http://www.modaco.com/topic/360832-romics-b952slim-rom/#entry2090693
In that post, I think "es" is the code for Spain. I don't know where he got that list from, but I think if you can locate a complete list somewhere, then you can find just your area as well.
If you find any solutions, please return here to post your experience.
Okay, unfortunately I did'n remember how well I protected my own wifi. I had to add the mac-addres in the "allowed' list. Now it's working fine.
The phone came already rooted and superuser installed on it. I installed unclemobiletools, but can't find the option "create recovery" there is only a backup from recovery. How can I create my own recovery? or extract a backup, or rom..
I tried to apply the CWM image from Tingbreaker but unclemobiletools does not recognize the image file on the sdcard (CWM 6.0.1.5.img)
Is it also possible with the SPflashtool, using the Readback funcion (F10). I also installled the tool from the russian guy (MTKdroidTools_v229) but this program fails to connect.
Strange. It worked flawlessly on my phone. Did you put the file in the root directory? Try removing the space in the name.
If Mobileuncle Tools really doesn't work, go back and read the first and the second posts here for how to use the flashtool. I've done both, so I believe both will work.
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Solution for GPS problem!!!
I finally fixed the GPS problem for Jiayu G2s. Im using LEWA ROM the 02 April 2013 stable edition which can be found here: check the attachment View attachment gpssolution.txt and the conversation with the mate that helped me to fix the GPS here : check attachment againView attachment gpssolution.txt
The gps confing file that you have to add is this, unzip it and use the file inside only: View attachment gps.rar
Enjoy guys!!!!!! :laugh:
I finally fixed the GPS problem for Jiayu G2s. Im using LEWA ROM the 02 April 2013 stable edition which can be found here: check the attachment View attachment gpssolution.txt and the conversation with the mate that helped me to fix the GPS here : check attachment againView attachment gpssolution.txt
The gps confing file that you have to add is this, unzip it and use the file inside only: View attachment gps.rar
Enjoy guys!!!!!! :laugh:
GPS fix
Not sure if this has been mentioned before, but a very easy way to fix the GPS - at least it worked for my G2S - is to install and run the 'Faster GPS' app from the play store.
App lets you specify your location for best sat coverage
Let us know what results you get...
Cheers
Not sure if this has been mentioned before, but a very easy way to fix the GPS - at least it worked for my G2S - is to install and run the 'Faster GPS' app from the play store.
App lets you specify your location for best sat coverage
Let us know what results you get...
Cheers
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okay, had to rename the file to "recovery.img" then it worked for me as well.
On what kind of machine did you run the flashtool? WinxP or Win7. In device manager I keep getting the yellow warning triangle at MT65xx Android Phone. When I select "automatically find available drivers" or manually show the folder where the files are (USB-VCOM-Drivers) Windows fails to successfully install the device.
Edit: It properly does work, I was able to do a "Read back". Start Read back>Plug in phone(without battery)>Red progress bar fills>Bleu progress bar fills>Popup window appears with green circle.
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I think you haven't completely read the instructions in the second post. I have used WinXP and Win7 and both work. But as the instructions say, I manually installed the drivers by copying them where they belong, and did not rely on Windows installation to do it for me.
There are other "tricks" in that post that will help people solve the problems I have already encountered when I was learning how to make it consistently work. (There are other ways to make it work, as you discovered, but my description in the second post should work consistently if followed precisely.)
Good luck.
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Dual sim dialing
The situation is the following: I've set sim1 to default but some contacts are marked to be dialed on sim2. When I dial such a number, I am always required to select which sim to use, Sim2 is simple marked as "suggested". In the case of sim1 marked or unmarked contact I don't need to confirm card, it is automatic. Is the any solution to make dialing fluent.
The situation is the following: I've set sim1 to default but some contacts are marked to be dialed on sim2. When I dial such a number, I am always required to select which sim to use, Sim2 is simple marked as "suggested". In the case of sim1 marked or unmarked contact I don't need to confirm card, it is automatic. Is the any solution to make dialing fluent.
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
There must be something I did do wrong.
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.
Mine came with the same firmware version and was rooted. Are you sure that you didn't deny all sudo requests in SuperUser?
No, it was not rooted.
Mine was rooted too when I got it. same official rom.
How did you found out that is unrooted? did you install UncleMobileTools yet?
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7“Unofficial” Guide to Flashing the Official Jiayu G2S ROM
Disclaimer: I’m just one guy who got this to work after a lot of trial and error. I’m only telling you how I did it. I don’t claim it will work for you. I don’t guarantee you won’t brick your phone by following these instructions. And you should understand that if you don’t bother to read carefully and do exactly what I say, you really can brick your phone. Also, it seems there has been an upgrade to some of the components in later versions of the phone released in March 2013, and you will want to verify which version of the phone you have before installing any roms. You should be able to check the rom build information for the date on your particular phone. This guide only describes how to flash the official rom from Jiayu for the G2S. If you intend to install some other third-party rom, please follow that rom builder's instructions.
Pre-requisites:
- You need a PC running Microsoft Windows 2000 or higher.
- If you haven’t previously installed msxml 6.0 and .net Framework 4.0 or higher on you Windows PC, do so first. Get them directly from Microsoft. (I assume you know how to search.)
Download the following:
- Latest Jiayu G2S ROM update; the rom I installed was the G2s_20130109-104044 stock rom: http://pan.baidu.com/share/link?shareid=157669&uk=839171988 (Note: the build number of the ROM after installation is: G2S 20130108-104044; don't be confused by the name of the file.) Use Google Translate if you need to see which button to push to start the download. Also note that there is a newer official rom for newer versions of the phone. The rom date is 20130306. I don't know what happens if you install the newer version on an older phone.
- This zip file contains the Android USB driver, VCom drivers, SP Flash Tool, and a document of these instructions (ReadMe.doc): http://www.mediafire.com/?tc4q3wy5eabowhf
Unzip the files you downloaded and move/copy folders and files where they need to go:
- Within the rom zip that you downloaded from the Baidu website, you can find the \G2s_20130109-104044 sub-folder. This folder contains the actual rom files (14 files). Move this entire folder onto your desktop. The reason for doing this is that there are folders within the zip file whose names contain characters that your version of Windows might not be able to read, even if you can see them in Windows Explorer (the filemanager). This will cause you trouble when you try to flash the rom.
- After unzipping the driver and flash tool zip file, you will find the \USB-VCOM-Drivers folder with \INF and \SYS sub-folders. In the \INF folder there are three other sub-folders: \ 2K_XP_COM, \Vista, and \Win7.
- Copy the \INF\cdc-acm.inf file into your C:\Windows\inf folder. (You may have to give permission to do this.)
- Based on your version of Windows (2K-XP, Vista, Win7, 32-bit or 64-bit), locate the one correct usb2ser_????.inf file and copy it to your C:\Windows\inf folder. (You may have to give permission to do this.)
- Copy both the \SYS\androidusb.sys and \SYS\usbser.sys into your C:\Windows\System32\driver folder. (You may have to give permission to do this.)
Install the drivers:
- Plug your phone into your computer with a USB cable. If you had not previously installed the drivers, the system will start trying to install them.
- If the system asks you to choose to install the drivers, click on “install the software automatically” and proceed.
- If system is unsuccessful in locating and installing the drivers, you can try to go back and locate the drivers yourself by pointing to the individual files, but this should not happen if you properly copied the drivers over to your C:\Windows system folders.
BACKUP YOUR DATA NOW!
- Proceeding beyond this point is going to mean that EVERYTHING on you phone is going to be deleted and a new system will replace it.
- You have been warned!
Warning!
- Attempting to install a rom that does not use the correct “scatter” file (see description below) will brick your phone. Don’t do it. If you aren’t sure a rom is made for your phone, don’t attempt to install it.
Install the updated ROM:
1. Turn off your phone, open the back, and remove the battery.
2. Plug your USB cable into your PC and phone. If your PC attempts to install drivers, let it finish.
3. Unplug your phone from the cable.
4. Start the SP Flash Tool program by clicking on the Flash_tool.exe file. If you get a security warning, allow it to run.
5. Click on the “Scatter-loading” button on the right side.
6. Browse to your \Desktop\G2s_20130109-104044 folder and choose the MT6577_Android_scatter_emmc.txt file. All other files will be chosen automatically.
7. Click on the “Firmware -> Upgrade” button.
8. Plug your USB cable firmly into the phone. The Flash Tool will automatically start flashing your new rom. Wait for it to finish and show you the green circle.
9. Unplug your phone from the cable.
Rebooting the phone:
1. Install your battery.
2. Very carefully, without touching the screen, push the power button.
3. Do not touch the phone as it boots!
4. After it has completed booting, you may again use your phone normally.6JIAYU G2S
The Jiayu G2S was released on January 1, 2013. It was a significant upgrade to the G2 with a lot of hardware changes. For the price, it had an impressive list of specifications:
- MTK MT6577T ARMv7 Cortex-A9 Dual-core 1.2GHz processor
- GPU: PowerVR SGX531
- 4 inch QHD IPS screen, 960x540 pixel display, OGS (One Glass Screen)
- Dual SIM cards supporting GSM 850/900/1800/1900mhz & WCDMA 3G 2100mhz network (only one 3G slot)
- 1GB RAM / 4GB ROM
- Supports up to 32gb class 12 microSD card (TF card)
- 8MP rear camera, 2MP front camera
- Supports WiFi a/b/g & WiFi hotspot, Bluetooth with EDR & A2DP, GPS & AGPS
- Android 4.1 OS (Jelly Bean), multi-language
- FM Radio
- Gravity Sensor, Proximity Sensor, Light Sensor, Magnetic Sensor, Gyroscopic Sensor
- 2200mah battery
- Size: 125 x 61x 9.9mm
- Weight: 145g with battery
Overall, I really like the look and feel of the phone. Except for the ear speaker hole, the front is one solid piece of glass, wrapped around with a very solid metal frame. The metal frame is not just a thin piece of sheet metal, but is cast metal, provides for complete rigidity for the whole phone, and should do a good job of protecting that large piece of screen glass. This also means that the phone has a bit of weight, but that feels good in my hand. Additionally, I like the more rectangular design of the phone and the more square edge down the sides that the flat metal frame provides. It is very easy to hold onto.
Call quality is very good for me. Reception seems on par with other phones I've used. The wifi might be a bit weaker than my Huawei G300, but it is fine. The screen is very nice to look at and very sensitive, but you should read below about the "jump screen" problem. You should also read below about potential problems with GPS connection issues. I've now owned two of these phones. The first had the jump screen problem, and was replaced under warranty. The replacement has terrible GPS pickup, but no jump screen problem.
The large battery means that I have no problem getting through a day of use, and I probably could use it for two days without a charge most of the time. (But I do not use the phone for gaming.) The phone runs most of the time at 1001mhz or 250mhz when on, and will only jump to 1200mhz in extreme conditions. "Deep sleep" mode is for when the screen is off, but the phone will run at 1001mhz when charging no matter if it is on and being used or not. That is an issue for phones based on this MTK chipset and not exclusive to the JY G2S.
Jiayu includes a few apps targeting the Chinese market for this phone, but other than that, the OS is mostly "vanilla" Android Jelly Bean (AOSP). The phone comes already rooted, so freezing or deleting unwanted apps is a simple solution for what you don't want. There are a number of modified roms available already, including the Lewa rom (http://www.needrom.com/phone-roms/jiayu/g2s/). But you should note that later hardware versions of this phone have different components. You should make a note of what the rom version is that came installed on your phone so that you know what hardware version you are using.
"Jump Screen" Problem Solved?:
Many of the first batch of phones were plagued with screen problems. Commonly referred to as the "jump screen" problem, the result is that when scrolling through screens of data, the screen just "jumps" to a different location without any apparent reason. The screen also "quivers" when touching it, even if you aren't moving your finger. Jiayu promptly acknowledged the problem and tried to correct it with a quick ROM update released on January 9, 2013. (The build number of the ROM is: G2S 20130108-104044.) This ROM update did seem to work for some, but for others the problem persisted.
At this point, I personally don't know if the problem has been completely solved in the manufacturing of subsequent batches of the phone. My phone had the problem, and flashing the new ROM did not solve it. I returned the phone for replacement under warranty and did receive a replacement phone that does not have the problem. So whether or not there still is a manufacturing problem, Jiayu can replace the phone with one that works. However, see below for the GPS connection problem that I now have.
GPS Connection Problems:
There are also a number of users here who are reporting difficulty with weak GPS fix. My GPS fix on my first phone was excellent, but my replacement phone is not good at all. It has been suggested to install "Faster GPS" from the Play Store, which will let you set your location. Also, you can look at this post from later in this thread for more information: http://xdaforums.com/showpost.php?p=39975417&postcount=209. (Please post any solutions you discover in this thread.)
ROM Flashing:
One of my initial struggles was getting the official rom flashing tool to work. I finally got things going, and I hope I can help others who "just don't get it". So if you want some detailed instructions in English for how to flashing a new official ROM onto the Jiayu G2S, have a look at the second post. (If you are flashing a third-party rom, follow the rom builder's instructions.)
ClockworkMod Recovery:
"Thingbreaker" has provided us with a working CWM Recovery. Here's his post link: http://xdaforums.com/showpost.php?p=37521066&postcount=28
There are two ways to flash the CWM Recovery image: using the ROM flashing tool (harder) or using Mobileuncle Tools (easier).
- To use Mobileuncle Tools, install it from the Play Store (free). Copy the CWM Recovery image file to the root of your SD card, making sure there are no spaces in the filename. Run Mobileuncle Tools and choose Recovery Update. Choose the recovery image file that Thingbreaker provided.
- To use the ROM flashing tool, you first you need to understand how to flash a complete rom as explained in the second post of this thread directly below. After you know how to do that, then look at this post to learn what is different about only flashing the recovery image: http://xdaforums.com/showpost.php?p=37499848&postcount=23
Conclusion:
I do not recommend purchasing this phone. Period. Until Jiayu can do a better job of quality control, I don't recommend their products. There are other companies out there who's phones are only slightly more expensive, but who have a much better reputation for quality control.
Jiayu, if you are reading this, you need to do better! And you really need to improve your repair department as well. Sending me a replacement phone with a GPS problem causes me to wonder if you are using the "shuffle" method of passing around bad phones instead of repairing them. I'm NOT a satisfied customer.6My 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:
It couldnt lock more than 5 satellites or reach more than 15m accuracy.
Now, take a look how it works with my design:
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.4here is my CWM Recovery, it's work on my device.
DWYOR
you can flash it with SPflashtool, or mobile uncle tools [root]3Links 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 SPFlash G2S (mirror link)
20130109-104044 SPFlash G2S (official link)
20130109-104044 CWMFlash G2S (mirror link)
20130109-104044 CWMFlash G2S (official link)
G2S JB - 20130306-143807 ROM SP & CWM
20130306-143807 CWMFlash G2S (mirror link)
20130306-143807 CWMFlash G2S (official link)
20130306-143807 SPFlash G2S (mirror link)
20130306-143807 SPFlash 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
