Mod - Jiayu G2 Dual Core 1GB Jelly Bean 4.1.2 upgrade

Hi all,

as promised here you have a guide to successfully update your Jiayu G2 Dual Core 1GB Android ICS 4.0.4 to the latest version, that is Adroid Jelly Bean 4.1.2.

Before starting, I have to say that there are 2 different ways to update the phone, by recovery and by SP Tool.

My advice is to upgrade by SP Tools, to have a clean installation and avoid any kind of problem.

The SP Flashing Tool 

This said, let's start.

1) First of all, you have to download this:

https://mega.co.nz/#!GNwiyYzJ!Z6sRAmT_D4tw2XqfbIgSonVan-sGmviCUMTT8QURdl4

It's basically the Flasher (updated to fix a UBOOT.bin issue with the JB 4.1.2 IPK) and the Jiayu driver folder.

2) Extract the archive on your desktop

3) Go to the extracted folder and enter the "USB VCOM Driver" folder

4) Select your Windows version and open the relative folder (if you have Windows 8, like me, the Windows 7 folder is the choice)

5) Once inside that folder, right click on the file according to the proper version of your Windows (x64 or normal).

6) Select "Install" from the menu

7) Select yes to the "not firmed driver" warnings and let Windows install the drivers

8) Now, with the driver installed, plug the USB cable to the computer and to the Jiayu and turn on the Jiayu (Note. this is not mandatory, but since Windows will install some more driver, just let it do it).

9) After this, unplug the usb cable from the Jiayu, open the back cover of the phone and remove the battery

10) Download this firmware (is the Official 4.1.2 from Jiayu. I've tried a lot of firmwares and as for now the one running better (and without weird Chinese apps) is the official one):

https://mega.co.nz/#!HFRW1DAL!D-ffeBzV7fcd7psCafYT2jOG9nQbHi2BaUWvkjIvtJU

11) Extract the firmware on your desktop

12) Now go back to the SP Flashing tool folder (the first file you downloaded), right click on Flash_Tool.exe and "run as administrator" (dunno if it is needed on XP, I don't think so)

13) Once the program opens, click on the "Scatter-loading" button on the right

14) Locate the Firmware folder and select the scatter txt file

15) If you did everything good, the program should load the firmware without any error message

16) Once done, click on the "Download" button 

17) Now you have to be quick. Connect the usb cable to the Jiayu and quickly insert the battery

18) If you did it quickly enough, the program should start flashing the firmware. If not, redo the process

19) Once the flash is done, a green circle will be shown. You can unplug the Jiayu, remove the battery for some seconds and then put it back together with the back cover

20) Turn on the Jiayu and you will have the new firmware 

Note. Your phone will be in Chinese at this point.

To have it back in your language, just enter into settings and then scroll down looking for a small "a" image on the left. Once located, enter that menu and press the first option to select your language

Note2. All the firmwares listed here are only for the Jiayu G2 Dual Core 1GB mobile phone version. If you flash this firmware on a different version of the phone, you won't have the camera working or the phone won't boot at all.

Cheers

kok