• Title: JIAYU G3
  • Listed: 01/01/2013 6:31 pm
  • ROM Version: ROM Android 4.1.2
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Overall Rating : 20

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Author adMember Info


  • Listed by: SoCr@Te
  • Member Since: 05/15/0470


ROM JIAYU G3 – ROM Android 4.1.2

ROM size: 202MB
Android version: 4.1.2
Updated :2013-01-01

– Fix single card dual signal XX problem. – Fix ringtones or vibration invalid after shutdown. – Repair on 3G network speed limit problems. – Fix WIFI signal improved a lot. – Fix camera the painting color cast problem. . Optimization of the front and rear camera clarity.

These quality rice native updates.
- Add some utility software – to change the boot animation – minor optimization of the following is a known bug: – photographic front black screen, it is estimated that the new drive according – breathing lights still unavailable, behind ready Repair – currently only found two bugs experience the new version 4.1.2 of feelings: – boot prompted wizard – the process of using smooth not cards – Fix a built-in external storage – according to the update of high quality rice, this 4.1.2 will be very low power consumption – camera Rear photographic effect very good pre-black, the only uncomfortable. – Bluetooth, wifi, updated no problem – wifi little effect to enhance the feel good – all the basic services, to meet the general needs of worthy brush into because kernel modifications, this version of the kernel 4.1M, subsequent updates picture to appreciate: everyone in and other official 4.1, like early experience can brush into this version update, the previous version of the bug fixes.

Brush process :

Unpacked driver installation InstallDriver.exe
To unpack SP_Flash_Tool_.zip run Flash_tool.exe
Select a the in MT6577_Android_scatter_emmc.txt in Recovery with Flashtools
Click Flash_tool.exe interface Firmware-> Upgrade

Phone after taking the battery in put something
Connect the data cable
Brush finished with green circles appears

Then deducted batteries back into the system
Key plus the power button on the phone off the volume
To enter the selection mode
Select key on the volume
Select the first recovery volume button to confirm
Enter QingTian key board recovery


Install MobileUncle Tools avaialble on market
Download: recovery_cwm5.5.0.4_ENG.img and put in the root of SD carrd
Open MobileUncle Tools
Click on update Recovery
Choose the recovery_cwm5.5.0.4_ENG.img and follow the instructions
And now you have a english recovery !

Root G3 :

1- Connect your g3 activating USB debugging mode
2- Run the runme.bat in any case the file that ends is .bat
3- select option 1 and leave work
your G3 will reboot is normal

Look this video.


Warning! This ROM Really swaps the two SIM Cards! SIM1 becomes SIM2 and SIM2 becomes SIM1!
(thx orionbg)

※Please make a backup of your device before installing or updating ROM

18 Responses to“JIAYU G3”

  1. 12/30/2012


    It have been running quite nice for the last 12 hours since I installed it! A lot faster than the 4.0.4 builds out there!

  2. 12/30/2012


    Hi, the same for me … it running quite good BUT no LED wroking and I really don’t like that !!
    Probably later …

  3. 12/30/2012


    now there is the “3G” next to the signal bars (didn’t have in ICS)

    no led
    in phone specs it’s recognized as UMI X1..

  4. 12/30/2012


    I found a strange bug! Last evening I connected the phone to the wall charger as the battery was low. 3 hours later I disconnected the phone as I had to go out and it was at 89% battery. This morning I connected it to complete the charge and an hour later there was a green led indicating the charge is over. I pushed the power button to wake the phone but nothing happened! It was stuck! I removed the battery and put it back again. The phone was ok and at 94% percent Charge! I connected the phone to the wall charger again and after no more than 5 minutes later, it was stuck again! Only a battery removal remedies the situation! This is the first time I charge the phone with this ROM and the first time the phone behaves this way! The first nearly three hours of charge didn’t affect the device! Maybe something happens at the end of charging (or near the end of the process) Can you look into this please?

  5. 12/24/2012


    I am now getting “E” next to my mobile data, which means it isn’t utilizing 3G networks and I am getting much slower mobile speed.
    Any hint?

    My network is WCDMA-2100

  6. 12/30/2012


    SoCr@Te, Do you mean the battery charging bug I experienced, or the missing LED notifications?

    • 12/24/2012


      I’m pretty sure the battery charging bug has become present in many 4.1.2 roms, I even had it in the Maizu 4.1.2 rom. Best bet is to let it do a complete 100% charge by doing automatic power-off/power-on to charge your phone the whole way.

      As for LED notifications, it hasn’t been working ever since the first 4.1.2 ROM but hopefully it gets worked on soon.
      Oh well, another +1 to battery saving there :p

    • 05/15/0470


  7. 12/30/2012


    antypant, which SIM slot is your SIM Card in? Only SIM1 is 3G Capable! SIM2 is 2G
    I have (H) almost all the time and the internet speed is OK

    • 12/24/2012


      I used to run my SIM in Slot2 “W” and I was getting 3G speeds fine with it.
      Ever since I updated this ROM it turned it towards 2G speeds somehow? Must have swapped the compatibilities of either slot system wise.

  8. 12/30/2012


    antypant, According to the Jiayu G3 Manual, only SIM1 slot is 3G Capable! I’ve always used two SIM cards in mine and always SIM1 was the 3G one no matter of the ROM (4.0.4 or 4.1.2) Maybe your previous ROM had the ability to change the 3G Card? I’ve seen this option in one of the ROMs I’ve tried…

    • 12/24/2012


      I knew that fact and found it odd at the same time.
      I’m assuming the ‘G’ and the ‘W’ standed for GSM and WCDNA. And seeing as my network runs its 3G network off WCDMA by default I assumed the Sim would be well fitted to the ‘W’ slot and well, voila, there was 3G connectivity.

      I’m guessing the manual refers to China’s own mobile networks. As I’m pretty sure their 33G runs off a different band to the one I’m on?

  9. 12/30/2012


    Warning! This ROM Really swaps the two SIM Cards! SIM1 becomes SIM2 and SIM2 becomes SIM1!
    May not look as a big problem but if you have Data plan on one of them and none on the other, it can be very unpleasant when you receive your next bill! I’m glad that some of “antypant”‘s comments made me check what is going on and I found this before much internet traffic went through the wrong SIM card!

    • 12/24/2012


      Thought something cheesy was up with the whole SIM interface :p
      Glad you resolved a problem though! antypant/ubelai :)

      I’m now experiencing the charging problem you were! Yet to do a 100% charge with the phone off.
      Only way I’ve avoided this was when I flashed this ROM over this ROM: https://www.needrom.com/mobile...../jiayu-g3-2/

      All was working fine until something happened with the contact db and as a result no contact names were showing in my messages, just phone numbers! So I did a re-flash to the stock rom via SPFlashTool then added this one over it fresh. Fixed the contact problem but now I’m facing the charging problem! Hope a fix is found soon!


  10. 01/02/2013


    Hi I need 900 WCDMA /UMTS / for data connection  .It is good rom?

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