Could I put a T Mobile sim card in a Sidekick? Help 10 points?

I have a normal T Mobile Slider and I really want to get a T Mobile Sidekick online on like EBay. Could I take the sim card from my slider and put it in my Sidekick??? Would it work fine since they're both T Mobile?? Thxs

Could I put a T Mobile sim card in a Sidekick? Help 10 points?
Since they're both T-Mobile phones it'll work fine.
Reply:yes it would work fine but to get all the features the sidekicks have like the Internet you will have to pay like 20 dollars extra a month. But if you dont want to pay you can just use it as a phone and to text.