The best phones are satellite phones, depending on the region/hemisphere you
live they are hard to triangulate. depending on the foot print of the
satellite coverage and region. but they are a bit expensive, Lately their
prices have drop a lot. SAT PHONES COULD TALK VIA ENCRYPTION POINT TO POINT,
iF YOU HAVE THE MONEY TO PAY FOR THAT KIND OF SOFTWARE. REMENBER there is
nothing that big brother has not cypher.
For example: Thuraya phones, they come in various models, some models could
use them with dual Sim cards. including an adaptor to use your famous IPHONE.
https://en.wikipedia.org/wiki/Satellite_phone
http://www.thuraya.com/
http://www.iridium.com/default.aspx
Considering that you are buying a sat phone, do your home work diligently
always check the foot print of the satellite network.
IRIDIUM phones are usable world wide, but Thuraya is not. If you purchase a
sat phone buy one outside the USA. I bought my thuraya in dubai UAE. I found
out, some of the features on that specific model are not available in the USA
model bacause governement regulations. For example: Able to disable the GPS
IN COMMAND and P2P conversations, unlimited text messages.
Later on time I bought one IRIDIUM, SEA FARER phone in Kuwait, was the best
investment, gorgeous, robust, water proof phone, included p2p PHONE FOR FREE
via encryption, as long the other party was in the same network.
Good luck
