Unlock iPhone 4 iOS 6, baseband 4.12.02?

I already pre-ordered a factory unlock from officialiphoneunlock but it might take weeks to get my unlock. Any other options?

That site is a scam, they will not unlock it.
only the original carrier can unlock it.

It's locked to which country, Network?
You can use the Remote Unlock service to Unlock it from network lock… Visit the site http://www.mobileunlocksolutions.com/apple-iphone-4/rs1wp9/ get the remote unlock service and unlock it from network lock easily. Then use with other Network sim card… Here you can get the phone unlocked within 12 to 24 Hours(approx).

There's no unlock for ios 6, you may be scammed.