Can I factory unlock an iPhone that has already been unlocked with a sim adapter?

I want to factory unlock my iPhone 4s so I can update it. However, the phone has been unlocked using a gevey SIM adapter thing. Can I still factory unlock it? How?

Hi

you can factory unlock your AT&T IPhone & use it with GSM SIM card around the World
just submit your IMEI number provider will send you the confirmation mail at your email then Connect your iPhone with I tune and you will receive message from I tune that your iPhone is unlocked

You can factory unlock your iPhone 4s using the remote unlock method. You
can get the remote unlock services from the site http://www.unlock-zone.com
and unlock it easily from the network lock.