I have both as well on AT&T, the A7 has batter battery life, sound quality on video recording is close, the v20 has better low light of course. the a7 records in h265(4k) which can save around 30% after 10 min
http://www.talkandroid.com/guides/beginner/how-to-install-the-lollipop-ota-on-your-nexus-device-download-links-included/ i used this and it worked , make sure you wipe data, and its power then vol up
dont know if its been said before but if anyone has and pc related issues, connect the phone go to device manager and completely uninstall google nexus android device adb at top, after that reconnect phone and it should say Find 7.
yes you can flash it i have a find7a us version and have been on chinese version for awhile battery is great in no major bugs. in twrp make sure you wipe system before install
How di you get 2.014 when I install it even from full install in std recover y it gets to setup wizard , after language is chosen it say settings closed.
i have settings crash prob also on clean install, restore non system apps nfc fix. oddly tho setting work for few seconds as soon as the phone boots. fyi i dont have xposed