"By the way, I was wrong in my earlier post. The SPOT communicator is transmit only. It can not receive messages, although the Globalstar system does offer two way (duplex) services also, transmission and reception is done on different frequency…"

"There are quite a few different competing satellite phone networks, both Low Earth Orbit and geosynchronus.
This SPOT system uses Globalstar, wich can also be used for sat-phones. It is LEO and has 44 satellites. Any globalstar satellite needs to be…"

"Very different SPOTs indeed.
The Smart Personal Objects Technology that was built into watches and coffee-makers is based on FM-radio and is one way only, it broadcasted weather and some other info, is one-way, and only reaches as far as the…"