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A couple friends of mine had the experience of one of them being injured, 5 miles or so from their car. Luckily one of them was able to hike out and bring help.
I was thinking about this a little, and it seems to me that it might be possible with a drone, and a phone, to send and receive a text from a remote canyon area with no cellular bars. On the ground, with no bars, initiate an SMS text message to a trustworthy friend from your phone that includes your GPS coordinates. Also send a text to your own 11 digit phone number (US subscribers). Attach the phone to your drone, and go high enough to (hopefully) get some cell phone coverage and send your text. Land your drone and verify that you received a copy of the message you sent to your own phone (this indicates that you succeeded in sending and receiving the text message). Wait a while, and relaunch to resend the message, and hopefully receive a reply to your text.
There are still some problems with this idea, of course, but perhaps others can help get around some of the remaining problems, and we could figure out a procedure that might help someone send and receive texts when they would not otherwise be able to.
I was thinking about this a little, and it seems to me that it might be possible with a drone, and a phone, to send and receive a text from a remote canyon area with no cellular bars. On the ground, with no bars, initiate an SMS text message to a trustworthy friend from your phone that includes your GPS coordinates. Also send a text to your own 11 digit phone number (US subscribers). Attach the phone to your drone, and go high enough to (hopefully) get some cell phone coverage and send your text. Land your drone and verify that you received a copy of the message you sent to your own phone (this indicates that you succeeded in sending and receiving the text message). Wait a while, and relaunch to resend the message, and hopefully receive a reply to your text.
There are still some problems with this idea, of course, but perhaps others can help get around some of the remaining problems, and we could figure out a procedure that might help someone send and receive texts when they would not otherwise be able to.