Yes, Oppo F11 has Corning Gorilla Glass 5 display protection.
No. Oppo F11 does not have the front camera LED flash but it has display screen flash.
No. Oppo F11 does not have Dolby sound support.
Yes, Oppo F11 comes with a hybrid sim slot but it also has 128GB internal storage and OTG support.
You can record up to 1080p resolution HD videos on Oppo F11 rear camera. Additionally, you can also record up to 720p resolution videos with the front camera of the mobile.