I downoaded the last iPhone software version between the
end of August and the end of September. iTunes doesn't
want to sync because I'm not using a 'valid' carrier.

If you could please take a look in here. I would really
appreciate if you could please tell me what to do:
I updated - should I post in iPhone hacks ?? - MacRumors Forums

Thank you in advance, kind regards,

igmolinav : ) !!!

P.S. Please tell me if I should move to another (sub)forum,
I chose this one because I have an older iPhone version