"oppo smartphone" - OPPO R21 was 6.4 inches with Capacitive screen , multi-touch with display resolution .
OPPO R21 is powered by Qualcomm Xiaolong and the RAM of 8GB. The phone internal memory capacity is 128GB. As for us the camera concerned, it has front and rear camera with 25MP and 16MP.
OPPO R21, the battery capacity is 3500mAh and Non-removable battery.
OPPO R21 has Nano SIM card , dual sim. The Connectivity options include Gravity sensing , distance sensing , light sensing , fingerprint recognition , electronic compass , fast charging , gyroscope.