I preformed this replacement on my LG G4 and found it to be very easy. However, between Steps 5 and 6, I will note a Warning...My camera was firmly attached to the frame with double sided tape. I simply removed the cable connector for the camera prior to lifting the Motherboard off of the frame (Step 6) and then pried the camera off of the frame using the spudger tool. I was able to reuse the tape on the replacement camera.
Same as Drew. My model has two antenna connections. One as shown, and one on the left side of the motherboard.
Step 7 MAY be better done prior to Step 6. 7's cord comes tight before there is enough lift room to get to Step 6's plug in my opinion.
Be careful not to lose these screws when they are unthreaded. Use tweeters to grab them before removing the Torx driver.