There are 2 ways to use Razr in a foreign country.
1. Use your VZW SIM card. You will need to get an international data plan ($25 for 100M) and pay something like $1.99 per min.
2. Get a local SIM card. The Razr is already unlocked after ICS update, so you just need to pop the card in and start making calls. Note that you will need microSIM, or have someome cut the regular SIM. Also you probably need to setup APN to connect to local 3G. There will be a message of "the SIM card is from a foreign source" when you reboot the phone, just ignore it.
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