The latest OxygenOS Open Beta 27/18 for OnePlus 3 and OnePlus 3T comes with new fresh UI for Do Not Disturb.This update optimized the standby battery usage.It also brings improvements to the system stability and Performance.If you are running the previous OxygenOS Oreo Beta on OnePlus 3 or OnePlus 3T we recommend you to Download and Install OxygenOS Open Beta 27/18 On OnePlus 3 and OnePlus 3T If you have the previous OxygenOS beta build installed, then you may have received the OxygenOS Open Beta 27/18 OTA (Over-the-air) notification.To manually check Go To Setting  then scroll down to System Updates > Check For Updates.If the update is not showing up then wait for few more days for the update to come or you can manually flash the update by following the guide given below.

What’s New In OxygenOS Open Beta 27/18:

New UI for Do Not Disturb We’ve made the Do not Disturb setting easier to understand Optimized standby battery usage Smart Text Selection improvements This option should now work as intended General performance improvements Updated OnePlus and GMS applications We’ve updated OnePlus Gallery, and fixed some bugs in Weather, Recorder, and File Manager Updated Google security patch (October 2017) Other bug fixes and optimizations Updates to language localization, fixes for extended screenshot in some applications, bluetooth performance enhancements, camera gesture fixes, and memory optimizations

DISCLAIMER

RootMyGalaxy.net is not responsible for any damage happened to your device(s) while following this guide, Proceed at your own risk.

PRE-REQUISITES

This Update is only for OnePlus 3/3T Smartphones. Follow the below Guide Exactly or else it may lead to brick your device. RootMyGalaxy.net is not responsible for any damage. We recommend to take complete backup and proceed. Maintain 50-60% battery to prevent sudden shutdown between the process.

Download OxygenOS Open Beta 27/18 for OnePlus 3 and OnePlus 3T

Download OxygenOSOpen Beta 27 for OnePlus 3 Download OxygenOS Open Beta 18 for OnePlus 3T

How To install OxygenOS Open Beta 27/18 on OnePlus 3/3T

Now, Install Open Beta 18 and 9 on OnePlus 3 and 3T executing the following command.

Wait until the installation process completes Done!!!

Source: OnePlus

Download Install OxygenOS Open Beta 27 18 For OnePlus 3 3T - 87