"SIM card inserted ... does not appear to be valid" after restore
I bought my iPhone 4 from a local Polish auction website. It was said to be factory unlocked. And everything appeared so, I updated it three times (up to 4.3.3) via iTunes and had no problems.
However yesterday out of pure interest ( :P ) I clicked "restore" in iTunes and now the phone says the horrible "SIM card... " which afaik means it has a SIMlock.
Does it mean that I was fooled by the seller and now have to jailbreak the phone?
Thanks in advance!