The iPod Touch is cheaper in the long run than and iPhone or smartphone because of the data usage. I have 4 children, all four have cell phones and iPod Touches. It was much, much cheaper to have both.
Wow! I thought I was the only parent with this situation! My poor dd complains that she is the ONLY teenager without an I-phone. She has a tablet computer, cell phone and Ipod touch. She is able to use ALL 3 at the same time. She goes through the wifi.
jmo