1) Download OxygenOS 4.1.1 zip file<\/strong> from above and save it inside the folder where ADB files are installed.<\/p>\n 2) Reboot your phone into Recovery Mode<\/strong> by turn off the phone and holding the Power and Volume down buttons.<\/p>\n 3) Now in recovery, choose \u201cInstall from ADB<\/strong>\u201d and tap OK to confirm.<\/p>\n 4) You see a screen with \u201cYou are in sideload mode\u201d.<\/p>\n 5) Connect your device to PC\/Mac and run the following command.<\/p>\n 6) Now wait for a while for the device to update.<\/p>\n 7) Done! Your device will automatically reboot to OxygenOS 4.1.1.<\/p>\n Follow the above guide to Install OxygenOS 4.1.1 on OnePlus 3T or alternately you can flash the full ROM via TWRP Recovery. If you have any question related to this post, feel free to leave that in the comment section.<\/p>\n<\/div>\n<\/div>\n<\/div>\nFor Windows:
adb sideload file name.zip<\/code>\r\nFor Mac\/Linux:
.\/adb sideload file name.zip<\/code><\/pre>\n