Yes, Gionee P7 Max is a 4G mobile phone.
Yes, Gionee P7 Max is a true 4V VoLTE mobile phone.
No. Gionee P7 Max does not have the selfie camera flash.
No. Gionee P7 Max has dedicated slot for the MicroSD card. It is not a hybrid slot. You can use 2 sim cards and 1 memory card at the same time in this phone.