Ask Slashdot: Best Pay-as-You-Go Plan For Text and Voice Only?

sconeu writes "My wife uses an assistive communication device. She wants to use it for SMS texting... We currently have Verizon, so we don't have a SIM. The computer will take a SIM. I'm looking for a pay-as-you-go plan where I can take the SIM from a cheap phone and put it in her computer. Any suggestions?" It would be interesting to hear how this question would be best answered both in the U.S. and around the world.