Can you use iMessage on the iPhone 4 while abroad?

I'm leaving on a trip to Europe tomorrow night. I want to use iMessage to let my loved ones know that I made it safely to my destination. The guy that works at Verizon told me that the iPhone 4 is not a "global phone", so I can't set up an international data or messaging plan, which is fine. But, can I still use iMessage from a Wi-Fi hotspot?

As long you have Wi-Fi

Yes it would work fine using Wi-Fi.

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