First you need to download and install the driver for your device:
- Download USB Driver for GTel Smatphone
- Next: Download Official Stock Rom for GTel Smartphone or Tablet
- Next: Download SP Flash Tools
Open flash_tool.exe and select Scatter-loading to find the ROM GTel Smartphone or Tablet directory, select the file MT6572_Android_scatter_emmc.txt
Press Download and remove the battery again (do not turn on the power) press the Volume up or down sound button to get the computer to receive the Driver and plug the cable to receive the GTel Smartphone or Tablet phone and the software will load the ROM automatically
Note: (Uncheck Preloader (Because it is running while it is out of power or cable is determined to eat HARD BRICK) So if you have a laptop, it is safer to run on a laptop.
After selecting, click Download
Wait for it to load as shown (Yellow stripe)
About a few minutes when the rom is successfully uploaded, it will notify Download OK that the rom upload process has been 100% successful and unplug the phone.