How To Install OxygenOS 3.5.6 on OnePlus 2

In this guide, you will be able to learn How To Install OxygenOS 3.5.6 on OnePlus 2 : The OnePlus 2 was released almost an year ago, and while it didn’t at all live up to its expectations, it was still considered to be a crowd favorite. Sporting the best specs in any phone at that time, the OnePlus 2 rocked a Snapdragon 810, 4 Gigabytes of RAM, Adreno 430, a great camera, and an amazing build. In spite of the crazy sepcs and the good build, it did manage to fall down way below under the price bracket of $400.

Very recently, the OnePlus 2 got an update to OxygenOS 3.5.5, which introduced a new UI with a ton of new features. However, many users (including me) have been facing annoying network drop issues while using both the SIMs. Being a dual SIM device, the OnePlus 2 is facing issues where the network drops to zero while activating both the SIMs. The only way to counter this was to disable one slot, or downgrade your device.

However, OnePlus released a fix for this issue, and you can follow our instructions on How To Install OxygenOS 3.5.6 on OnePlus 2.

How To Install OxygenOS 3.5.6 on OnePlus 2

Install OxygenOS 3.5.6 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 3.5.6 for OnePlus 2


  • 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 3.5.6 Zip file  on the internal memory of your device file (download section)
  • Now reboot your OnePlus 2 into recovery mode.Guide   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 3.5.6
    adb sideload File

(Example adb sideload

  • Once the process is completed, reboot your device
  • Done!! Your device should have the latest OxygenOS 3.5.6.

This is the full step by step guide to safely Install OnePlus 2 Oxygen OS 3.5.6 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.


Adnan Ahmed
Adnan Ahmed
An avid technology reader, author, and admirer, Adnan has been into all-things technology since age twelve. Since then, thanks to the exposure he has been brought into, Adnan now serves as an author on multiple sites including Rootmygalaxy,net.

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