This was mentioned many times, flashing with the version 9.11 can brick your phone and this is what happen. Read before do this things. The fully compatible version for Z1 is 9.13.
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My Evolution: Sony Xperia Z1 (Back Here), HTC HD2 (Still Here), HTC Diamond 2, HTC HD Blackstone, Nokia 7070 Prism, Qtek 9100, Nokia 3100, Motorola T720i, Nokia 3310, Sony Ericson PF 768 (Blue)