Problem with lock to network, OTA and root

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http://forum.xda-developers.com – Hello I have problem with Samsung Galaxy S3 I9300. I did root and unlock network 3 weeks ago. But today It running official OTA (4.0.4). After update phone is lock to network again. It look that root was deleted. I have not access to efs partition via Root Explorer. And I have not access to Clockwordmod (When I touch Pover, Volume UP and Home) too. Did I root phone again? Or? Thank you for your time. (HowTos)