What does unlocking do?

[komobu]

I understand jailbreaking, but what does unlocking do? Why does one want to unlock their verizon phone?

 

[i_is_for_iphone]

I understand jailbreaking, but what does unlocking do? Why does one want to unlock their verizon phone?

you wouldn't want to unlock a verizon or any CDMA phone you unlock gsm phones so you can use any carrier sim card in the device

 

[bab2010]

Yes, unlock to be able to use any carrier sim card on the iPhone.