I used an iridium go with an iPhone in a waterproof case along with an iPad in a water resistant case.
Worked well for voice calls, some drop outs but usually got a better connection on second try.
Great for texting, email and downloading gribs.
A bit fiddly to set up but seamless when done.
Actually setting up and getting ribs was the most difficult process.
Also had an inreach for tracking, sign of life coms and backup coms.
I installed a couple dual usb power ports to be able to plug everything in.
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds, wake in the day to find that it is vanity; but the dreamers of the day are dangerous men, for they act their dream with open eyes, to make it possible.
T.E. Lawrence