Cell Phone Watches are Back
These work surprisingly well for $30.
Icemonkey.com has them.
I ordered the digital in champagne color. My son still has his from the last time around.
It comes with a bluetooth headset and they will work with T-Mobile or AT&T. It has a speaker and microphone so its a complete phone.
If you have a smartphone, take a look at contract free $49+tax unlimited 4G plan at circlephone.com