Upgrade Keneksi Step to Android 6.0.1 Marshmallow
Download latest firmware Android 6.0.1 Marshmallow for smartphone Keneksi Step
The latest firmware android 6.0.1 marshmallow, 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 5.1.1 lollipop (rip from original firmware keneksi step).
Update firmware for other Keneksi smartphones.