Bricked my S3?

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http://forum.xda-developers.com – I installed CM10 unofficial and had signal issues and lost LTE so I wanted to go back to stock rooted. Flashed root66 via Odin and now my phone gets stuck at the 4g LTE bootscreen. I have tried everything to flash a recovery, but so far nothing has worked. I am able to access downloader mode and it says my phone is samsung official but custom and 1 flash count. What should I do now? (HowTos)