somehow I feel disappointed to buy meizu device, meizu always issuing new products but leaving old customers. the promised OS update is very time consuming and lagging behind. not for new products, as if the old customers had promised an update. NEED HOW MUCH TIME TO UPDATE SYSTEM FROM LOLLIPOP PAST MARSMELLOW TOWARD NOUGAT, are you kidding me? As there is no intention in the international market! china market or global market, we are also consumers. Do not neglect. apologize for this disappointment thank you