Hi, here is the latest firmware of CUBOT S308 MTK6582A Smartphone
Android 4.4 Version of Cubot S308
Download here: CUBOT S308 MTK6582A Android 4.4 Smartphone Firmware
Android 4.2 Version of Cubot S308
Download here: CUBOT S308 MTK6582A Android 4.2 Smartphone Firmware
Notice:Please back up your data first and then flash it to upgrade.
Before download the firmware, please check your smartphone’s Android version, the firmware for Android 4.2 and 4.4 are different.
You can also refer to this flash guide: How to flash MTK smartphones with SP flash tool?