If you're unsure which Satellite service to choose, then it is important to know the differences. The first question I will ask you, "is the phone going to be used for emergency purposes?" If the answer is yes then I would advise you to go with the Iridium handsets. If the answer is no then we can consider going with the Inmarsat IsatPhonePro. If you know which service your wish to purchase then click below. However if you're unsure, check out my helpful guide here.