My blackjack 2 will not come on battery is fully

Try consulting with the manufacture of your blackjack for instructions or carefully read through your product manual. Most phones turn on by holding the on button or the talk button and there is usually a switch for lock and unlocking your phone. You must also check to see if your charger is busted. If none of this helped the best thing to do is to exchange your phone or to just contact the manufacter of your device.