Below are the main highlights of OxygenOs 4.0.3 update. Known issues of this update and fixes – Fixed crashes for Line – Increased stability of the Camera app – Optimized exposure when taking night time photos – Updated Audio Parameters and improved the quality of audio recordings – Updated APN settings for select carriers

How to Install OxygenOS 4.0.3 on OnePlus 3/3T Manually

Note: Before updating your phone to OOS 4.0.3, make a backup of every data you have on the phone before proceeding with below steps. Also, ensure at least 70% – 80% battery charge remaining on the phone. – If you experience frequent Wi-Fi disconnections due to switches between Wi-Fi and data, please try turning off the Smart Wi-Fi Switcher at Settings > Wi-Fi > Configure Wi-Fi and see if the disconnections stop

  1. Download OxygenOS 4.0.3 OTA update for OnePlus 3 from here [source] and follow this OTA update guide.
  2. Download OxygenOS 4.0.3 Full ROM from here [source] and follow this ADB sideload guide.
  3. Download OxygenOS 4.0.3 OTA update and full ROM from here and follow this manual installation instruction. (Source 1, 2)