Okay, I live a half an hour from the French border. Is it fine to you I go buy an iPhone, and if it works with my Belgian sim I keep it. And if it doesn't work I can ask you for my costs? Deal?
Seriously, I wouldn't be surprised its really locally unlocked. Why would it be difficult? Each carrier must have its own kind of identity number, no?
How many carriers in the world? 1000? Its only a short list to check...
If it doesn't work you just return it, it's completely within your rights to do that. Or better yet you take them to court over it because you have an air tight case.
It's got to be way to much labor to lock the phone down to multiple carrier. After-all the phone is run through a SIM card and there can't be that much info stored on it. Most likely the locked phone only accepts a SIM with some type of serial numbers associated with Orange. Once the lock is removed all SIM cards operate. So to lock it to only national carriers Orange would need those carriers to disclose information about their SIM cards which I doubt they would willingly do.
Furthermore it would be one of the biggest mistakes they ever-made because the lawsuit would be eminent.