Oppo f9 has 4gb ram and 64gb internal memory , is an average phone for the price range.The performance of the phone is average , front camera is 25mp which is excelllent for selfie, but rear camera performance is not that much good.I am using several applications and some times the phone gets crashed, and another negative thing is about the processor , the mediatek is not performing well compared to snapdragon, overall performance of the phone is average I will not suggest this phone because other phones from xiaomi is available with same features and better performance in the market.sound quality is average, style and looking is good with notch display