Don't bother with the Globalstar. I've had both up until last August. The Iridium works anywhere/anytime. Usually can sit inside by a window and make a call. I traded my Globalstar directly into Globalstar and they sold me the Iridium. They credited me $400 on the Iridium for the trade in, and credited my unused Globalstar minutes (about $500 worth) to my Iridium sim card. It took me about 4 months of haggling to get Globalstar to pay me back what they promised for the exchange, and finally after threatening them with legal action they came through. I would NOT trade the Globalstar back to Globalstar, go to a different company. Globalstar has horrible customer service. One of the worst companies I have ever dealt with. Even if they get their system repaired and offer me free service, I would not go back. With Iridium, I bought the 500 minutes/1 year sim card for $600. I use about 300 minutes during the year on average, and for me that was the most economical plan. If you cross the Canadian border, quite likely you will need to start submitting flight manifests from Canada before re-entering the US in the near future. To do so you will need a sat phone that always works or internet service through the sat phone. No way Globalstar will work for that. The Iridium phone costs about twice the Globalstar, and is worth every cent.