Hello friends Reliance jio phone is very good phone and this is four G phone but single sim support and 4 GB of internal memory of this phone and front camera 2 megapixel and rear camera has 2 megapixel and this phone is support also video calling and already installed in this phone or jio TV and jio Express news jio for G voice are install in this phone and the battery backup of this phone is two three days ?????? ?? ???? ??