(LG V20) How do I remove these parts from the frame (picture)

I'm moving components from the old frame (left) to the new frame. I'm a newbie and I've been using youtube for help. I'm almost done; however, the parts circled in red remain, and I cound't find a tutorial online on how to remove them.

Any help would be greatly appreciated, like if you know some video where they show how to go about this. I've been looking all over youtube for it. Also, I would need adhesive tape to mount certain things on the new frame, like the side buttons, yes?