Hi guys , I bought an OPAD N3 http://www.onnchina....enu=499&big=yes The company recently released an upgrade firmware . I put it on the SD Card and updated . Now when I switch , the loading logo keeps showing forever . What do I do ? I bought it 2 days ago ! Firmware Link : ftp://188.8.131.52/N3 This tab is based on RK2818 chip . I can access adb and recovery mode , but can't select the options as there are no hardware keys except power , so can i attach a keyboard to select the options ?