Unlocked Phones and VZW

If I buy a unlocked quad band CDMA/GSM phone can i go to VZW and have it activated and added to my current plan,also can i get a sim card to use while traveling outside the us?

Verizon is CDMA, consequently their phones do not have SIM cards. One of the biggest benefits that GSM carriers offer is the ability to change your SIM card in the way that you mentioned. If you use Verizon and are going to be traveling outside the US, one option might be to get a prepaid cell phone while you are there. Prepaid cell phones are available in most countries in the world, and are a great way for travelers to make calls in a foreign country.

You can only activate Verizon branded phones on your Verizon service. If you want to be able to travel outside the US, there are numerous options, including CDMA roaming, depending on where you travel. Verizon also offers the Global Rental program and several solid Global phones, including the new BlackBerry 8830.