Hello,
Here are only the steps, send it to support@apple.com at least:
So what I did, and what I suggest you do too:
- send an email to the above recipients explaining the problem, that you bought an iPhone for the full price of 649$ + taxes (for the 16GB model), and that you specifically asked for it to be used in another country with another carrier;
- write that after you got in your home country you have the SMS problem;
- thus no iMessange and no FaceTime (I think this is the catch, as these are their most mediate features);
- provide them all the details about the phone: Model, Serial Number, IMEI, MEID, your phone number (at which you can be contacted);
- tell them that the email address with which the iPhone is associated in iTunes;
- try to send the email from the email address with which the iPhone is associated;
- if you can attach also a photo of the receipt, that would be great (I did that), the receipt has the Model and the
Serial number of the phone, so you are very credibile in this;
- if you can provide also the name of the store where it was bought (it's written on the receipt).
After the mail with the above details I got contacted the second day and the third day the problem was solved 😉