https://www.garmin.com/en-AU/p/592606
Pretty much a satellite phone that is text message only. On sale atm for $479 from anaconda and about $240 a year plan.
If things went pear shaped you can text the response team that organise coastguard etc so atleast you know someone is coming.
You can also text anyone from it so handy for letting family know you're alive on longer trips. Also specific location weather updates by text too.
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