>I realized that my phone checks my mail account (mail address with real
name); i guess once that happens, the exit node knows who i am and this could
be a problem if i transmit sensible data without encryption (ok, that's not
clever to begin with).
I thought that there was no computers with phone (Popularity known as
“smart phones”) that work with a fully free system. If you found one
please post more information. If it's a digital jail like almost every
computer with phone, then there is likely a lot of backdoors from which the
developers (companies or individuals) can get the information they want.
Adding Tor on top doesn't makes much sense; you may alleviate the possible
tracking from your ISP, but you will still have whatever malware (spyware or
otherwise, see https://gnu.org/philosophy/proprietary/proprietary.html) the
developers have put (That may also happen with free software, but if you
compile from the sources, the vulnerability may be obvious or may be
discovered by security researchers, or you, and so it's much more likely to
get discovered and fixed).
By the way, Tor uses a different exit node for different sites, precisely so
that a single exit node can't easily guess whom you are by the combination of
sites to which you connect. See the Tor documentation for more information.
