Guys,
Sorry to be the bringer of bad news, but these sites are run by unlocking companies. They are biased into telling you your phone is locked so they can sell you an unlock.
The only way to determine if your phone is unlocked is to try a different carrier's SIM in the phone. If it works, the phone is unlocked.
Even iTunes won't always show you the "Congratulations" message when the phone is unlocked. Trying a SIM is the ONLY way to be completely sure.
Sorry to be the bringer of bad news, but these sites are run by unlocking companies. They are biased into telling you your phone is locked so they can sell you an unlock.
The only way to determine if your phone is unlocked is to try a different carrier's SIM in the phone. If it works, the phone is unlocked.
Even iTunes won't always show you the "Congratulations" message when the phone is unlocked. Trying a SIM is the ONLY way to be completely sure.