Anyone who will have problem on updating the OTA 7.0, please follow the below steps:
enter into setting--about phone--wireless updating--search for the latest version.

Hi admin, update is not possible!!

1. dowload zip file is ok
2. unzip file seems to be ok
3. automatic restart does not work (waiting some hours)
4. after manual restart it is booting the old system (android 6)

I tried it four times, an i try a local update with downloaded .zip file,
same result. No update

Are there some ideas what is to do???

@admin: please help me, i need support...
thanks and best regards
holger

Version 20161011, no update

Как отменить или исправить обновление андроид 7 на предыдущею версию андроид 6