It's probably because I'm with AT&T but sometimes I don't get a text until 24 hours later, sometimes even longer. I also only have a tiny ten key number pad so when I do receive a text I wait until I get home to answer it via email on my computer. I feel like I live at Jurassic Park.This is where I thought a text message interface might be good, to support any old phone. Clumsy but well supported on old phones