The main feature of the iPhone 7 Plus was a camera that shoots in portrait mode. True, it does not always turn out to be natural - the edges are blurred more than necessary.
In iOS 11, you can turn off the depth effect even after creating a photo.
How to do this Step 1. Open the Photos app.
Step 2. Choose a picture created in portrait mode.
Step 3. Click Edit.
Step 4. Tap on the Depth icon at the top of the screen and click Finish..
... PROFIT!.
That's all. So you could save a good frame and at the same time remove the depth effect from it.