Upgrade Caterpillar Cat S40 to Android 7.1.2 Nougat
Download latest firmware Android 7.1.2 Nougat for smartphone Caterpillar Cat S40
The latest firmware android 7.1.2 nougat, starting upgrade from a PC with Windows 10/8.1/8/7/XP (this is a custom firmware for this smartphone, you install it as is).
The driver of the USB and software to update the firmware of the smartphone (run the .exe file for help on upgrading and starting the update).
Root firmware android 6.0.1 marshmallow (rip from original firmware caterpillar cat s40).
Update firmware for other Caterpillar smartphones.