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Amateur radio can kind do this. In fact there are text message digital modes like APRS. With digipeaters in the area I can send messages from a 5W handheld around the city. You can also then see APRS data online through sites like aprs.fi

The only thing is there's no encryption on amateur radio.

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The other "only thing is ..." is that there aren't any devices.

Whatever (text messaging on a HAM band) you want to use, there is not a qwerty (or touchscreen) device that you can use to compose those messages.

You either need to connect a computer to such a device or (I think) there are one or two handheld radios that you can type out messages using multi-tap.[1]

[1] https://en.wikipedia.org/wiki/Multi-tap

I like my th-d74 quite a bit. I even use the aprs to sms bridge when I'm out of cell service and in a pinch.

Yeah I agree it's somewhat frustrating there isn't an all in one device with a QWERTY keyboard but I usually Bluetooth pair my phone to my radio and use APRSDroid for a better messaging experience.

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