Oh. Yes, those DMR radios have T9 keypads. Its awful, but the best we have. For analog APRS, which as I said has questionable reliability (for many reasons), y

Oh. Yes, those DMR radios have T9 keypads. Its awful, but the best we have. For analog APRS, which as I said has questionable reliability (for many reasons), you can use a smartphone app (like APRSDroid) and either an audio cable to the radio (the smartphone acts as a software TNC that will generate the signal, the radio modulates it on the carrier), or a separate hardware TNC which connects to the radio via audio, but to your phone in another way such as bluetooth low energy (like Mobilinkd TNC3). Then you can type on your phone. (In that case, the protocol is still done by the phone, the TNC only generates the signal, the radio modulates it. Which is annoying due to power consumption.) (Analog APRS support which is built in to radios is usually position report only, not messaging.)