How to unlock bootloader of AT&T Galaxy Note 2?

jinjin12

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Nov 28, 2012
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So my sister has an Attt Galaxy note 2. I want to format her phone and install aokp or cyanogenmod on it cause they are smoother and faster roms. I searched on how to unlock and root the Galaxy note 2 but i've only found a bunch of guides showing how to root the phone, i haven't found one telling how to unlock the bootloader?

does anyone know how to unlock the GN2 bootloader, or is it already unlocked?
 
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