Download and Install OxygenOs 3.5.5 on OnePlus 2 ( VoLTE Support )

Great News for OnePlus 2 owners/users as OxygenOs 3.5.5 has been released for OnePlus 2 with many amazing and different features.The good news is that we have the full firmawre file which you can download.Today in this guide you will be able to learn How to Download and Install OxygenOs 3.5.5 on OnePlus 2.The best part of this update is that this update comes with VoLTE Support.So we recommend you to Install OxygenOs 3.5.5 on OnePlus 2

The Update is rolling out via OTA (Over-the air). So many of the users may already got the update.This OTA update is rolling out region wise.You can manually check for the update.To check Go To settings > About Phone > Software Update. If there is no update available in you region you can wait for the update to come or you can Download and Install OxygenOs 3.5.5 using the manually method from this guide. Follow this guide to Install OxygenOs 3.5.5 on OnePlus 2

You can download the Update from below link and you can flash it this update OxygenOs 3.5.5 has many fixes and news features as well it has VoLTE support , nice battery backup , Gaming is also improved , Battery saving mod , Android security patch level also updated and many other bugs are also fixed. Install OxygenOs 3.5.5 on OnePlus 2


You only are responsible for your device. We at won’t be liable if any damage occurs to your device and/or its components.




Download OxygenOS 3.5.5 for OnePlus2



  • First of all you have to Enable “USB Debugging” on your OnePlus 2 you can enable it by going to Settings > Developer Option ( You can enable Developer option by going to about phone then tap on build number 7 times. ) 
  • Download the OxygenOS 3.5.5 Zip file  on the internal memory of your device file (download section)
  • Now reboot your OnePlus 2 into recovery mode.Guide [icon name=”hand-o-right” class=”” unprefixed_class=””]  How To to Boot Into Recovery Mode On Android (Various Ways)
  • Once in recovery mode, Choose Install from ADB Sideload
  • Then connect your OP2 to your computer
  • Now open the command window from the ADB Folder.(Press Shift + Right click and open command window)


  • Check whether your device is connected properly or not.Issue the following command
    adb devices
  • If you can see your device’s details, then your device is properly connected and you are ready to flash the Firmware)
  • Enter this command in CMD Window to start flashing OxygenOs 3.5.5
    adb sideload File

(Example adb sideload

  • Once the process is completed, reboot your device
  • Done!! Your device should have the latest OxygenOS 3.5.5.

This is the full step by step guide to safely Install OnePlus 2 Oxygen OS 3.5.5 Firmware Update (Root/Non Root Users) Without Losing any data

If you have any question related to this post, feel free to leave that in the comment section.

Aditya Verma
Aditya Verma
My name is Aditya Verma a student currently studying in 11th Class. I've one passion which is 'Blogging' I also serve as an author on different sites. I always try my best to keep you guys updated with all type of Tutorials and Tech related News.

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