If you are texting when davening, you probably should not be davening at all.
Wow. What an interesting “all-or-nothing” perspective.
Sounds like Avoda Zara to me.
A totally unfocused davening is very possibly “nothing” (see Minchas Shlomo 1).
I would say it’s not worth the possibility of bracha/shem Hashem l’vatala.