so you are saying that it would be better to try and get the phone unlocked because of the global pricing. If i did get the card unlocked would everything still work as normal when i am in the usa. Sorry i got so many questions but i really don't understand all this global stuff. You also mentioned something about my u.s number so what do you mean about that. Will i not be able to use my regular number if i unlock the phone or go global through verzion. Sorry i'm not understanding. Thanks
In the US, you use Verizon's standard CDMA network. All the international features work on a different network technology (GSM) and anything you do there doesn't impact use in the US, so unlocking the phone makes no difference to how it works in the US.
Re phone number: If you stick with the SIM that comes with the phone (and activate it and add a global plan), then you keep your US phone number while you are abroad. So people can call you with your usual number.
In the GSM world, the phone number belongs to the SIM card, and not to the phone (which is why GSM users can transfer their card from phone to phone, keeping their plan, their contacts etc). So, if, for cost reasons, you unlock the phone and use a different SIM card, you will have a different phone number, which you will need to communicate to people who need to call you (or forward your US number to it but this may not be possible as forwarding to an international number may be blocked).
The only SIM card the allows you to keep your US number is the one that comes with the phone.
So, in summary:
1) Use the SIM card that comes with the phone:
Pros:
a) Same phone number
b) Easy: no need to shop around and obtain other SIMs
c) works nearly everywhere
Disadvantage:
Now expensive for both data and calling
2) Use other SIM
Pro: cost, generally much cheaper to use
Disadvantages:
a) Need to get phone unlocked
b) need to shop and find SIMs. Might be complex in various countries where SIM registration will require passport and other documents
c) May need multiple SIMs if going to several countries, or a regional SIM, which reduces the cost benefits.
So, if you don't expect to use almost any data or calling, or someone else is paying, going with the existing SIM is easy. If you plan to stay in one country for a while, or expect to return there, it is certainly worth doing the research and getting the SIM. I save about 95% on call and data charges doing this.
Hope that helps.