The texting problems are now solved with the addition of an LG Xpression 2 phone with a slider keyboard. The phone is compact and the keys work well. It is not in the same league with my iPhone but will do the job. I just slid the chip out of my flip phone and into the LG. The phone company sent a text message that it didn’t work but the phone works fine.
It was very tempting to just slide the chip into my iPhone and end this experiment. The only reason I’m still going is that my hands are hurting much less than before.