Can I switch SIM cards from 1 razor phone to another?

I have two identical Razor phones the one I normally use does not work can I switch SIM cards.

Can I switch SIM cards from 1 razor phone to another?
yes, only if the to phones r from the same carrier
Reply:Yes. Sim cards are interchangeable. You can put your card in an entirely different model if you want as long as it takes sim cards.
Reply:of course you can.
Reply:yeah why not if its the same servers no problem if not get the phone unlocked then it will work with any card you want
Reply:Yes, all sim cards are the same size.
Reply:Yes you can, you can put your sim in any unlocked gsm phone. When you put your sim it should read if it's not unlocked it'll say "subsidy code" which means that it's locked. Are you interested in selling your broken phone. If you are let me know. Thank you