unlock downgraded iphone

i downgraded my brand new iphone do i unlock it the same way i do with the others old version iphone
i used ibrickr to jailbreak then pacay to get through the activation screen and add anysim the new one or is there a different of unlocking downgraded iphones also are the iphones at the store right now the new or old verson

yes i think u use the same way as normal 1.0.2 users on a downgraded phone. and the phones in stores now varies, some get 1.1.1 some get older versions, it depends on where u buy it.