Network unlock code

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http://forums.androidcentral.com – I got this TMo GNote 2, and want to purchase a Sim subsidy unlock code but according to this website if the Android is not 4.1.1 it will not work, Im running T889UVBMB4 Samsung Galaxy Note 2 Unlocking Issue! | CellUnlocker.net for Unlock Codes Does anyone know if this is true? Or should I purchase the code? Also found this pound code to unblock it but I havent tried it yet... Free UNLOCK N7105 - xda-developers Any one have experience any issue with the code running 4.1.2? (HowTos)