Download kenbo P7800 Official Firmware
Learn How to flash/unbrick kenbo P7800 From here
Quick Specs:
General
Announced 2015, September
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA
4G Network LTE
Body
Dimensions --
Weight --
Others Dual SIm
Display
Type IPS LCD capacitive touchscreen
Size 5 inches,
Memory
Card slot microSD, up to 32 GB
Internal 16 GB, 2 GB RAM
Call records Yes
Phonebook Yes
Sound
Alert types Vibration; MP3, WAV ringtones
Speakerphone Yes
Data
GPRS Yes
EDGE Yes
Speed HSPA, LTE
WLAN Yes
Bluetooth Yes
USB Yes