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Make sure you are on stock lollipop or a lollipop/marshmallow based custom rom. From V2 it can be flashed from KitKat also Flashing directly from KitKat is creating problem. Flash it from LP/MM based ROM only
Obrátil bych se na XDA, tak s trochou štěstí dostaneš odpověď. Tady spíš ne.