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.
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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