3G to 4s. I remember texting in the mall parking lot with the 4s and immediately noticed the text looking way better. I can’t remember all the details, but I think I was with att at the time and i dropped 399$ on it. Pretty sure that was a higher storage than the lowest and I didn’t want to do it but said screw it. Oh wait, of course I was with att lol. Now I’m on the 15pm. I’ll be honest, everything is great and I have no complaints, but I need a change. We will see what the next few months brings.