Download KitKat 4.4.2 Android stock firmware for Jiayu G5S smartphone (PC flash version) from here or here. Download KitKat 4.4.2 Android stock firmware for Jiayu G5S smartphone (SD card flash version) from here or here. Download another Jiayu firmware from here.
Archive name: JIAYU G5S (2+16GB) Android4.4 ROM card version / JIAYU G5S (2+16GB) Android4.4 ROM PC version
Firmware image: MP_mt92_s8_g5sw_jyt_kk_wcdma_ldata_mul_tphone_
20141031-201713_songlixin_TF.zip / MP_mt92_s8_g5sw_jyt_kk_wcdma_ldata
_mul_tphone_20141031-201713_songlixin_PC.zip
Archive file size: 463 MB / 470 MB
Support: Mediatek MT6592
Project: vanzo92_cwet_kk
Config_version: V1.1.2Build number: S8-user 4.4.2 KOT49H eng.scm.1414757667 test-keys
Upgrading notes (see this video tutorial)
1 – Download & unpack FlashTools. Run Flash_tool.exe
2 – Unpack Rom in folder
3 – Select MT6592_Android_scatter.txt in folder on rom. And wait.
4 – Check Option->USB Model, click USB Model
Choose Option->DA DownLoad All->Speed->High Speed, click High Speed
5 – Turn off your phone, remove the battery.
6 -"Press F9 (or hit Download button)"
7 – Connect your phone into the computer with USB data cable.
8 – The process will start and a red progress bar will appear after color purple, yellow.
9 – And green circles display.
10 – Boot your phone
11 – Restart device
12 – Enjoy
ADS HERE !!!