This is good quality device and this is very cool and awesome device and this decide lunch by oppo in 2017 Ans this mobile is camera and music phone oppo f3 is dual sim ( Nano+ nano) and daul stand–by ( 4g+ 4g) and Android v6.0 marshmallows operating system with 1.5GHz octa core proseesor, 4Gb RAm, 64GB internal memory, expantable up to 128gb memory card, and it’s give oppo a special feature like fingerprint lock scaner and light sensor and other more sensor