Please find more information here.
On the remote phone installed Teamviewer Host.Now, almost a day can't connect,although the phone is 100% network
Are you trying to connect from a computer to a phone? If so, that is not possible because teamviewer only supports the remote control use of teamviewer from a phone/tablet to a computer not the other way.
I hope this helps,
Thank you for using teamviewer!
You are right,there is a server application for managing phone...
No i am wrong! A moderator pointed me out that i was wrong! Here is a link why https://community.teamviewer.com/t5/Knowledge-Base/Supported-manufacturers-for-remotely-controlling-Android-devices/ta-p/4730