Then don't bother texting and get to know them face to face. Text them to ask them out and then after that text them just to say.. "call me, I'd like to talk." If they don't call you then pffft... they're not all that interested to begin with.
I think if you're not trying to date under the age of 35 then you should be able to find someone that knows how to appreciate the voice function on their hand held.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion