SIM Lock and Via facotry unlockable difference

[mister98]

difference between the SIM Lock and Via facotry unlockable.
It's possible unlock SIM lock with soft.

 

[willerz2]

Question's contradicting and vague from your wording. SIM lock essentially means the device is locked. Factory unlocked devices are ones that are unlocked during production by Apple. You cannot unlock a device using software unless you're on the 3G or 3GS.