... of checking Mobile Phone is as follows:1.Functioning Test: Outlook, Calibrate screen, Keyboard, WIFI, Camera, ... -Sensor, Bluetooth, Microphone, Speaker2. We shall test if there is any other special function.3. ... Accessory Test: Battery, USB Cable, Earphone, Charger, TF ... ! We look forward to cooperating with you! Low cost 3.5inch Built-in GPS Android2.3 MTK6573 ...