Download Android 4.4.2 KitKat ROM for JIAYU G4S smartphone from here or here. Download previous firmware version from here. Download another Jiayu firmware from here.
Archive name: MP_mt92_s8_g4sw_jyt_kk_wcdma_ldata_mul_
tphone_20141113-154404_songlixin_PC
Archive file size: 497 MB
Model: JIAYU G4S smartphone
Support: Mediatek MT6592
Project: vanzo92_cwet_kk
Config_version: V1.1.2
Install ROM
- Go into Recovery and Wipe All Data / Factory reset
- Run FlashTools
– Only if you have Android 4.2 on your SmartPhone you have to Format before (please SAVE NVRAM before)
– Only if you have Android 4.2 on your SmartPhone download also the preloader.bin e put it togheter the other files
- Select the contained MT6592_Android_scatter_emmc.txt inside ROM compressed file
- Wait file to be added into Flash Tool
- choose Option->Connection->USB->USB Speed->High Speed
- Turn off your phone, remove the battery
- Select "Download only"
- Connect your phone into the computer via USB data cable
- The process will start and various progress bar will be displayed
- At the end, a green circles will appear
- Only if you have Android 4.2 on your SmartPhone go into Recovery mode and Wipe All/Factory Reset
- You can now safely disconnect your phone and turn it on.
- Only if you have Android 4.2 on your SmartPhone you have to Restore NVRAM and reboot
- Finish!
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