What software can fully control the phone on android?

Question

Android

Hello.
I used to use teamviewer, but for some time now on a phone (Mi3) with Android 8, he began to write that only observation is possible on this device. I don’t know what has changed, but I need software to fully manage the phone, without confirmations, without too many launches, i.e. so that the program always hangs in the background. This is necessary for the elderly (take a video call, show a photo, etc.).
What do you advise?

Answer 1

vnc
or
https://xsavikx.github.io/AndroidScreencast/
vnc must either be in listen mode or run through a repeater
and here are a lot of problems with vnc support on android
https://www.airdroid.com/ru/

Answer 2

If samsung then this app is
https://play.google.com/store/apps/details?id=com....