Download Android 4.4.2 Kitkat stock firmware for iOcean G7 smartphone from here or from here. Download a newer firmware version from here. Download another iOcean firmware from here.
Archive name: iOcean G7 fw
Archive file size: 538 MB
File update name: MP_mt92_s9_os903gw_ousheng_wcdma_kk_ldata_mul_
Platform: Mediatek MT6592
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
12 – Enjoy