The "Phone Info" app does enable the Verizon GS3 to make calls and send/receive texts in Europe without being rooted. I just returned from a trip and was able to use it in Germany, Spain, France, Italy, Greece and Ireland. No data, though, so Google maps was all but worthless even though I had gone to the trouble of downloading maps of all the major cities I was visiting before I left.
Just change the network type to one of the GSM options and prepare for a big bill when you get home.
Interesting that Verizon let me purchase an international data plan before I left even though I couldn't use it. I only found out that it wouldn't work when I called Verizon from Spain (on my GS3) to ask why I couldn't get a data connection. Customer service offered to reimburse me for the cost of a prepaid phone if I purchased one over there, but I never did.
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