Hopefully, you are independently wealthy
If you can afford sat phone service, you must have a decent budget
Keep in mind that sat phones won't work well inside (they still require line of sight), so you won't enjoy the same comforts of regular cellular phone service per se.
FWIW, it's pretty easy to use a $3 SIM cutting tool found on ebay, etc. to get the job done. [Why would a 30 year military guy care about having to cut a small piece of plastic?? just teasing ] You could just as easily pick up a Samsung Galaxy S3, which takes micro SIM cards (like the iPhone 4/4S; 5 now uses a nano-SIM). There are several foreign pre-paid carriers that use micro-SIMs anyway, if you don't want to deal with modifications.
Just don't get too hung up on the 'phone wars'. Pick one and enjoy your travels.