Thanks again for sharing your impressive level of knowledge on this topic.
I'll probably go ahead and purchase the phone anyway. The combination of ruggedness, IP68 and battery life seems to make it very well suited for outdoor life.

Thanks for taking the time to create such an informative post.
I am considering this phone for use on mountaineering expeditions. You mention that it is possible to customise frequencies. Would it be possible to customise the radio to transmit on 121.5 or 243 international distress frequencies?