How to check "factory unlocked" status
Here in my country (Argentina), there isnt an Apple Store and you buy from sites similar to EBay that bring, according to them (sellers), Iphones 3GS Unlocked (factory).
Is it true that there is an Apple site in which you can put your Iphone serial number to check this and the Iphone status?
How can I manually know for sure? Like, restoring factory settings and trying my SIM (making a call)?
Thx.
Pentium IV, Windows XP Pro, 1 GB RAM