i bought my p2 this summer. I upgraded to android 7.0. I almost bricked my phone along the way but I made it.
I feel that the phone signal reception has decreased like a lot. I am living in Berlin and using mobile data in the subway was not a problem using Android 6.
The phone crashes at random points when opening random applications. Only way out is to force a reboot. I get messages of apps that stopped working and will be restarted as well.
The thing that bothers me most however is that the android version comes with a not properly signed licence key. It works with a test key instead if a release key. Quite a couple of apps refuse to work on my phone because they suspect the phone to be rooted. I have seen a post of the admin here to request a proper licensed version sonewhen in October but nothing happened since then.
Have you made any progress on that issue?