I am using this phone(OPPO F3) for last 4 months. It is the best camera phone I have used in the range of 20, 000. One of the best part of this phone is its dual front camera(16 megapixel), one for selfie and the other for wide selfie(group selfie). with 64 Gb internal storage you can store a lot of photos, videos and many more data in your mobile. many of the phones in this range is having hybrid sim, but in this mobile you can insert a external memory card along with the two sim. Rear camera of this phone(13 megapixel) is really awesome, the quality of the pictures is really appreciable. there are also many gestures in this phone which makes you more free to use the phone. weight of the phone is also too low so you can handle it freely. The only one thing on which the manufacturers should focus on its improvement or you can say the only demerit of the phone is its speakers. the are not too louder but on the other hand the quality of the sound is much clear and good. the most important thing that makes it stand in the front of all the other phones in this range is that this phone does not hang. I am using it for last 4 months, till now it never hang. so, if you wish to buy a smartphone I n the range of 20, 000 I will recommend you to buy this phone.you will be happy using this phone. Thank You.