[Q] Unlock != voided update eligibility?

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http://forum.xda-developers.com – I already hijacked another thread with this topic, since I consider it important enough for the wide open public, I created this thread and post the question in a more general way. Unfortunately I didn't bookmark the page as I visited it yesterday evening, so I cant prove that I found this information, but take my word that I really did find the information as stated in the following lines: In the process of reserching stuff for my brand new Xperia T I stumbeled upon a tutorial/how-to page which clearly and credibly stated, that unlocking the bootloader irreversibly breaks official updatea (HowTos)