Do all Sim cards work with all cell phones as long as they are unlocked?

if the phone is unlocked AND takes a sim card, then yes it will work. You may not be able to access the WAP service nor media messaging, but otherwise it will be fine. You'll need to check w/ the carrier you use to see if they have configuration settings for the phone you are using to enable those.

Do all Sim cards work with all cell phones as long as they are unlocked?
yes.
Reply:the phone has 2 b the sam phone company as ur sims card my bro knows some 1 that tried that and now the phone is not useable so make sure its from the same phone company as sim card or u will ruin a perfectly good cell phone
Reply:Yes, all of them except verison because they do not have sim cards in their phones, but if the phone is unlocked then yes!
Reply:yeh they are suppose to but u probably nees 2 + minutes
Reply:only if its the same carrier
Reply:it shuld work perfectly as long as its not verizon or metro cuz they dont hav sim cards
Reply:yes but some countries they dont due to coverage,
Reply:Not with Verizon, their phones dont have cards. I think it will in other phones if they take sim cards.