I just noticed that it actually doesn't have a slot for a sim card, so it won't need one.. sorry about that, this phone is just really similar to a different phone I have on ebay that does take a Sim card.
I do have a Sim card for it that can be used if you want to put it on a t-mobile plan. Otherwise, you can get an individual sim card on ebay for about $5 or the sim card pack for about $15
To anyone who would want to put the phone on a t-mobile plan, I have a t-mobile compatible sim card that I'll include in the package. Just let me know :)
If it's AT&T or Verizon you can go to the store or call them and they can do it for you. It can still be done with sprint, t-mobile and cricket, but it may have to be in the store.
It depends on what company you're transferring to. For some, the store can do it for you, and for others you can do it online with YouTube tutorials. All you would need for that is your phone and Internet access.