I currently use the official 4.4 KitKat update from LG, and there is a sound issue with it where it makes a sizzling noise when listening to anything. I am thinking of rooting and flashing a custom ROM onto it but I'm worried of getting my warranty void. I want to make sure that when I unroot it that my warranty is restored.
Are you talking about this audio bug ?
If yes, it seems LG began to fix it with the last update on vodafone D802 (in the same release wich has the knock code feature). So if you are afraid of root, you can wait for your device update.
I don't know if D802T can flash D802 firmware, so i don't recommend this.
However there is a link (vdf ES)
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