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https://corners360.com/2018/06/10/oxygenos-5-1-6-update-for-oneplus-6-adds-portrait-mode-for-the-front-camera-battery-percentage-in-status-bar-and-many-more/
OxygenOS 5.1.6 update for OnePlus 6, adds Portrait Mode for the front camera, battery percentage in status bar, and many more