Redmi 3S is good phone by MI.Price of this phone is 6, 999.It have Qualcomm Snapdragon processor and we can insert dual sim in it.Both sim slot are 4G enabled.It don’t have biometrics unlocker.Ram of this phone is 2GB, internal storage is 16 GB and external storage can be expanded upto 128 GB.It have dual camera, rear camera is of 16 mp and front camera is of 5 mp.It have Android 6.0 Marshmallow.It is OTG enabled.It have li-po 4100 mah battery which is Non-Removable.It have sensors like compass, etc.It is best phone at cheap price.