Can you conect an unlock iPhone 4 16gb from at&t to boos mobile?

IPhone 4 16gb and it is factory unlock which means it is fully unlock and forever.

Even while i unlocked my iPhone 4 from the third-party service providers like http://www.mobile-unlocker.com/apple-iphone-4/rs2wp9/ who provides Remote unlocking method in online, i can't use it with boost mobile. Because, boost is one of the CDMA network.AT&T is a GSM network. Once, i have unlocked my iPhone from GSM network, i can able to use it with other GSM networks not with the CDMA networks.So, i can't connect an unlocked iPhone 4 from at&T to boost mobile.

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