Are all SIM cards the same in like demension?

Will a T-Mobile sim card go in any phone? Or a cingular sim in any phone? Are they all the same size therfore all of them can fit in any phone?

Are all SIM cards the same in like demension?
If it is a locked phone and your sim card is for a non 3G phone than it can go to a non 3G pone and if the sim card is for a 3G phone than it can go to only a 3G phone on the same carrier phone.


If the phone is unlocked than you can use it with other gsm phones if you sim card is for gsm as long as it is like about 3g go with 3g and non 3g go with non 3g. I hope this helps
Reply:YA u can do so . But some companies are fools liike Cingular who does not allows us to change the sim...
Reply:your just dumb.