I want to expand on the Fair Usage issue.
Many users of TeamViewer are flagged as not being eligible for free fair usage and my understanding is that in such cases their sessions time out very quickly or there's a total block.
This came to my attention recently as I've been using it more often than usual this month and my connection was kicking me off very quickly over numerous sessions,
But apparently that wasn't it, because the issue resolved itself.
Anyway, in cases where Teamviewer does flag your account the way to fix it is to file an appeal in which you must explain what your usage is about.
They promote free usage to help friends with technical stuff, etc. It's really good to help elderly relatives etc.
In my view if you were honest to them on an account appeal and told them I used it to fake being in the US for financial firm logins in the US, I would expect them to NOT approve of that usage.
I don't want to test it!
You could lie but then they could probably look at your usage and figure out that you've lied, which might be even worse.