I had t-mobile sidekick and I can click on any phone number and send a text messages. How do I do the same with a nextel 7520 BB??

Nextel doesn't support native SMS. SMS is not part of the iDen specification. There are several threads about how to do SMS with a Nextel (it is not as easy as it is on a GSM device like the Sidekick).

Search on "nextel SMS" or "7520 sms" and see what you get.

Good luck!

AAARRRGGGHHHH!!!!! Did any one of you send me the following SMS?

"Hi! I'm back late 2night any chance u r around this wk?"

That's all my 7520 says. No clue who sent it.

I already called the 2 people I know who use SMS and it was neither of them.

Does anyone know a way for me to find out?

I actually know that the answer is no, but I needed to vent.