Now you can enable VoLTE support for your OnePlus 2 by Download OxygenOS 3.5.5 update. HydrogenOS 2.5 with VoLTE functionality was already available but if you want to enable VoLTE on OxygenOS then you should download and install OxygenOS 3.5.5 for OnePlus 2. OxygenOS 3.5.5 for OnePlus 2 is an Incremental update which rolls out in phase wise manner. The update is spread out via OTA (over-the-air) and many users already receiving the update notification. You can wait for the OTA updates, otherwise you can Update Oneplus 2 to OxygenOS 3.5.5 manually with below method. Download OxygenOS 3.5.5 for OnePlus 2 from following guide.

You can flash on your device with the OxygenOS 3.5.5 ROM. OnePlus 2 OxygenOS 3.5.5 update added VoLTE, battery saving mode, app lock, gaming mode, update OxygenOS UI, optimize many apps, and fix several bugs. So if you want to update your OnePlus to the latest version then Download OxygenOS 3.5.5 for OnePlus 2 from below.

OxygenOS 3.5.5 Features and Changelogs –

• Enabled VoLTE functionality for select carriers
• Added App Lock
• Redesign of the Volume Adjustment Bar
• Updated Android Security Patch Level to 1/12/16
• Increased System Stability
• Updated Interface and UI of the Clock app
• Added Battery Saving Mode ( Settings > Battery > More )
• Shelf Optimizations
• Updated OxygenOS UI
• Added Additional Options for the Alert Slider.
• Added Gaming Mode ( Settings > Developer Options )
• General Bug Fixes

Note:-

• Follow the steps carefully otherwise you may crash your device. We are not liable for any damage to your phone.
• It will wipe all your phone data, so we advise you first to take a complete backup of your phoneand then proceed.
• Make sure that your device has at least 50-60% charged to avoid the unexpected shutdown in-between the process.

Download OxygenOS 3.5.5 for OnePlus 2

• OxygenOS 3.1.0 to OxygenOS 3.5.5 OTA File –Download
• OxygenOS 3.5.5 Full ROM for OnePlus 2 –Download, Mirror

How to Install OxygenOS 3.5.5 ROM on OnePlus 2

METHOD 1:

1) Enable ‘USB debugging’ option from setting>developer option>. To enable Developer Options, go to About phone and tap the Build Number 7 times.

3) Download ADB and fastboot driver for windows orADB and Fastboot for Mac and install it on your PC.

4) Download the OxygenOS 3.5.5 for OnePlus 2 from above Copy ROM to a folder where adb installed.

5) Now Turn Off your phone and boot into recovery mode.

3) Choose Install from ADB Sideload/USB

4) Now Connect your phone to Laptop/PC

5) On Marshmallow ROM folder press shift+right click and click on open command here.

6) Now check your connection by typing the below command

if your device is listed, you’re ready to flash the ROM

7) Flash the OxygenOS 3.5.5 on OnePlus 2 by typing below command

METHOD 2

1) Download the OxygenOS 3.5.5 Zip file from above and save it in your Internal Storage.

2) Turn off your device and Boot into the Recovery mode by press and hold “Volume Down+Power Button”

3) Now Wipe data and cache if you want a clean installation otherwise skip this step.

4) Now in Recovery select your preferred language and select Install from Local.

5) Now select the Zip and Click on Install to start the process.

6) Now wait until the installation complete and then Reboot your device.

7) Done.

That’s all this is the complete guide to Download OxygenOS 3.5.5 for OnePlus 2.