H2 Factory Firmware

Here is the latest version from the board manufacturer:

Ok - this is official BT calling release - goo.gl/TAHWoB

Flashing MTK watches is the same procedure for every watch - regardless of the name, model or brand.

I use SP tools from here spflashtool.com/   

Some other versions give errors.....

Here is a great guide made by Sonia - one of our moderators