Phone security is a big issue these days.My recommended solution is to get a wifi-only tablet for secure communiations loaded with something like a combination of Redphone and Silent Text with a good overseas commercial VPN and get a non-smart (flip) phone for voice and text when you are driving or otherwise away from your wifi.
I don't think a smartphone is a good choice these days. If you are going to pick one, Blackberry or Blackphone are probably the only reasonable choices.
