Download Android 4.4.2 Kitkat stock firmware for Umi Zero smartphone

Download latest Android 4.4.2 Kitkat stock firmware for Umi Zero smartphone from here or from here.  (flashable from Windows PC via USB cable). Download previous firmware from here.

Archive name: UMI ZERO  MTK6592T 182763 20141217 / Y800
Archive file size: 358 MB
Project: ratech92_cwet_rlk_kk 
Platform: MT6592

config_version: V1.1.2

Upgrading notes (see this video tutorial)
1 – Download & unpack FlashTools. Run Flash_tool.exe
2 – Unpack Rom in folder
3 – Select MT6582_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