THIS IS THE LAST 24.09.2015 FULL OFFICIAL STOCK FIRMWARE BASED ON ANDROID 4.2.1
Can be installed on any version with PC.
Installation: Method MFT|PFT Installed over any firmware, Russian language to select the file EasternEurope. For those who are first sewn, before connecting the phone to the PC recommend to go to droidboot (power off the phone then press "Volume +" and "Power") to connect to the computer, and then in the menu select "Reboot", the firmware will start automatically. If you sew with the help of MFT do not forget to change the PID settings and to tick the box, this is very important.