So I've spent my entire first day in Europe learning about the "unlocking" process with Verizon. First off it's important to note that Verizon is not factory unlocking your phone when they say they are "unlocking" it. It simply means that they are "unlocking" it for use outside the US. If you are in the US you cannot use another US provider, like AT&T, on your "unlocked" Verizon phone.
Before I left for Europe I had Global Support activate Global Features and had my iPhone "unlocked" in preparation for my trip. Once in Europe, I purchased a sim card here in Brussels from Proximus.be (aka Belgacom Mobile), put it in my "unlocked" phone and it DID NOT WORK. I've spent my entire first day in Brussels reading forums and trying whatever I can to get this new sim card to work.
Here's the issue:
After you put in your new sim card and activate it you get this message (It does not matter if the phone is plugged in, or if you have iTunes open):
The SIM card that you currently have installed in this iPhone is from a carrier that is not supported under the activation policy that is currently assigned by the activation server. This is not a hardware issue with the iPhone. Please insert another SIM card from a supported carrier or request that this iPhone be unlocked by your carrier. Please contact Apple for more information.
Here is what fixed it:
Here's what I got out my experience, and largely why it was so painful:
Verizon, you should really do something nice for me for patiently wading through this awful experience and writing this support article for you. - Koshi.
thank you for this explanation and i agree verizon should do something nice for you! i also had my phone unlocked and now in the only two countries i've tried i get the same message...verizon says they cannot help me b/c they do not provide support for foreign SIM Cards...unbelievable. Anyway, since I have updated to iOS7 I do not have those options you mention.."Settings > Carrier, turn off automatic searching. In Settings > Network > Roaming, turn off International CDMA" Any ideas for how I might get my SIM card to work? I know it's not the card(s) as both times they work immediately and fine on my wife's AT&T iPhone 4S...thanks