Default Upgrade To Jellybean

I Need To Be Update My Ambrane Ac 770 Voice Call Tablet From ICS 4.0.4 To JB 4.2.2.... Need A Firmware...

Check Specification On Ambrane Website Then Post Link For Jellybean Firmware My Dear Friends....

Its A Voice Call Tab So Need Firmware With Voice Call,Bluetooth,Wifi Hotspot....


Sent from my AC-770