Got the same problem today. Xperia XZ draining battery fast and overheated constantly. All official software and updates. Went for repair via companion software. Got an error message. Now phone cant turn on saying software update failed but i also cant make another repair or software update because it says the phone is locked. How can i unlock it when theres no way to boot it? What the is going on? Why is the phone dead after using all official Sony software?
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