Just spent 13 days in Bridger Wilderness in August ‘25. Was WAY off the grid and way off the trails. Age 66 and concerned about having a connection in case things went south.
Took both devices with me. Was using the InReach both with and without the Messenger App on my phone, and was using the iPhone with the new Satellite service. Software up to date on both devices. Sent daily texts to family just apprising them of where I was and that all was OK.
Garmin user interface is dated and clunky. Has old fashioned menu/scroll/click interface all read on a teeny screen. Requires some setup and practice. Garmin is simply hard to use without the messenger app on your phone (thus two devices). However, Garmin connectivity (finds satellite, sends msg, confirms sent) was quick and faultless: 100%.
iPhone is of course a beautiful interface and has clever icons showing where the satellite is overhead, etc. Could not be easier to use. However, iPhone satellite connectivity very hit and miss. Was able to send update texts to one of my kids 100%, but unable to send at all to wife or others.
My conclusion: iPhone sat connectivity is not ready for prime time; still needs work. Garmin is secure and completely dependable— but you gotta practice and have contacts loaded before you go.