"System software not authorized by Verizon wireless..."

[Walid Quatermain]

Hi I just rooted my vzw gs3..4.1.1....(I unlocked sim lock so I can't update to 4.3)..whtvr after root when I try to go to revovery mode it says .."System software not authorized by Verizon wireless...".it doesent go to rec. Mode at all....now I can't even reset my phone...cant event do twrp and cwm stuffs ..do I need to unlock bootloader??...plz help..I also want to install CM 11

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