You need to call Verizon Wireless' Global Services and request to have your phone SIM unlocked. I don't have access to the number at this time. It might already be in your phone contact list. It was there on my Thunderbolt when I got the phone.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
Thanks for the reply Ann154
Yes, you would need to contact our global support team prior to using the device abroad. Their number is 908-559-4899
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