Download Android Jelly Bean 4.2.2 stock firmware for Jiake F1W smartphone from here or from here. Download another Jiake firmware from here.
Archive name: JIAKE F1W MTK6572 173752 20141219
Image: A13_JB3_3G_EMMC_32_4_SD_703EA_F1_C_20140922 11：18
Archive file size: 264 MB
Model: Jiake F1W smartphone
Project: yuanda72_wet_a_jb3
Platform: Mediatek MT6572
Config_version: V1.1.1
Upgrading notes (see this video tutorial)
1 – Download & unpack FlashTools. Run Flash_tool.exe
2 – Unpack Rom in folder
3 – Select MT6572_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 !
12 – Enjoy !
