Awesome research! I was just thinking the other day, about how a qwerty layout for T9 might have been easier and more efficient. Cool to see something even better. A little off-topic, but this 6-button keyboard format looks perfect for my dream device.

I take a lot of walks. I often listen to an audio book while I do so. I also frequently get texts, or hear something in the book I may want to write down.

I've always wanted to be able to handle these situations without taking out my phone, but rather clicking buttons in my pockets. For example, I get a text while listening to music. Click a button to hear it read out. Type out my response. Send it. Open notes, write a reminder to buy bread. One-handed, blindly, while on a walk outside. No voice recognition - no "OK Google" nonsense.

I've considered getting a Twiddler - but they're expensive, and I don't think I can easily configure it to do these things - particularly browsing and responding to messages - or opening up a new note, while listening to an audiobook.

Does anyone know some combination of software and hardware that can do some of this for me?