Oppo is one of the peofasional company and f1 is a verry good phone as it have many good features It containes android 5.1.1 and opperating system is colour os which is a specific os of oppo and it uses less batery it is fine even with 2500Amh battery which take 2hrs to get charged and it have 16gb internal memory and 3gb ram which makes the phone hang less and expandebal memory is 256gb and it have fine procesor with quad core + quad core which makes octa core and it have a good grafics of snapdragon616 and the phone glass is protected with corning gorila glass 4.
And alsothey provide telred glass and also silicon cover the phone have a good disine with silver bright finishing and also also slim and less weight it have a special feature called off screan touch eher you can star any app or on the phone even when the phone is sleaping it have 12months warenty and 30d days return back.
Totally the phone is fabulous and I did not tell about the camera as it is speachless It is a camera phone made for camera So dont go back order the phone by online or bisite any nearby shope.