[Huawei Mate 9 Questions & Answers] QueasyRider:
I am starting to have a love/hate relationship with this phone. I love it. It hates me. (I'm including the whole story in case others have came across any of these other issues that I have, because at this point in time I feel like I could take this thing apart and put it back together in my sleep).

I bought one for a good price on ebay, get it and all is well for about 2 weeks. The case starts to appear to start splitting. I take the back off and the battery is swelling. I could have sent the phone back, but I found a battery for $12 and so I replaced it. Everything's working great.

About 2 weeks after that, I was walking up the stairs at work and tripped, the phone caught the corner of my wrist and the bottom left part of the screen shattered. I find a new screen/assembly and think, for $50 I got this...

After watching pretty much every video on YouTube, I'm feeling confident and get started. The screen came with the basic took kit and each of the two "guitar pic" type tools were destroyed in the process. (I even tried an actual guitar pic, ineffective and flimsy). Good basic concept with those, but they are pretty much a one time use thing. Glad there were two.

I tested the new screen before I took the whole thing apart, every test passed with flying colors. Take everything apart, attach the new screen, get to the end (the one part of the video I apparently failed to really pay attention to) the proper way to pop the screen back in. Get to the last part of that and crack. The screen, with very little pressure, cracks as the top left. Not bad, it was still usable. But I was so disappointing.

I was pretty bummed out and hobbled along. I should have went with the same source, but I ended up getting another screen from another source and when it finally arrived, I didn't think about it, and went ahead and took the phone apart, put everything on the new frame, getting ready to pop it on the back cover, decide to test it then. No response what so ever from the touch screen. It would power on, but nothing would make it swipe to the lock screen. (I also noticed in the top corner "No Service" (an issue that I have since seen people get but no real reliable fix). I put the old screen on. Works like a champ, take everything apart a couple more times thinking maybe I didn't get something right. Nothing. I contact the vendor and he is awesome and he sends me a free replacement.

This time I test the screen. Right off the bat I get Touch Disable Mode. Crap. Look up that and find the Settings Database editor solution. (I tried the volume up + power but as soon as the screen locked it enabled again). Screen passes all other test, but now there is that lingering "No Service" issue. I never really figured out what fixed that. But this is what I did. 1. took all of the red film off of the new screen, Now the phone shows my carrier, but still no service. So I did a factory reset. and Voila, good to go.

Which brings me to now. I have the new screen ready to go in and I notice 1 part that is throwing me off.

I really don't want to take this apart again...

I don't have a pic of the original screen as my phone is currently in pieces... But this is what I came up with if anyone has any ideas on how I should approach this, and what is the significance of this part? I can't find anything on it. From here on out said part shall be called "flappy thing":

The top two screens in the pic are two screens I now have in possession.

https://xdaforums.com/picture.php?albumid=15076&pictureid=57893