Oppo launched F1s for the selfie enthusiasts, it has 16 MP well-performing camera; brightness and visibility of display is quite sharp but you may miss the Full HD display. The CPU used in phone is entry level this could be better. Battery backup is sufficient but it takes time to charge the mobile, means you may miss the Fast charging ( VOOC) , There are better performing phones available in market like Moto G4 Plus, Samsung Galaxy J7 2016 and Lenovo Vibe X3.
These are the cons that I found about this phone:
Oppo using entry level CPU in mid range smartphone.
Pre-loaded OS is Lollipop which is now an older version.
Non-Removable Battery.
Doesn’t support NFC.
Resolution of display is only 720p.