Worried about Uncle Sam reading your email? Well, in communicating with others, send a letter. The Post Office doesn't read every letter (how in the world could they?). They only read specific letters identified in a court order based on probable cause.
Or, if you are really, really worried, use a courier service.
Also, don't buy an iPhone. They have an irremovable battery that keeps the phone perpetually "on." This feature lets your phone be tracked by all and sundry. Buy an Android; mine has an easily removable battery and when the battery has been removed, the phone is dead as a doornail -- just give the internal capacitor a minute or so to discharge.