Hi,
I'm sure there are a lot of topics about this "issue" but I don't know how to search them. I have an iPhone 4 locked on a France carrier and I don't know which carrier it's locked on. How do I find that ?
That's a tough one.
Probably if you have some sims from various France carriers you can see what one activates the phone or can make calls without displaying unsupported sim.
That sucks.
I think there was a website somewhere where you enter the serial number and it would tell you but dont remember the url or how reliable it was.