Recently OnePlus starts rolling out OxygenOS 3.5.7 update for OnePlus 2 which fixes the Lost IMEI number. This update is similar as OxygenOS 3.5.6 but it is launched for users who missing their IMEI during downgrade or reverting back from HydrogenOS. If you also misplaced your IMEI number or want to fix lost IMEI number on OnePlus 2 then you should download and install OxygenOS 3.5.7 for OnePlus 2. If you lost your IMEI number otherwise it is similar update as 3.5.6. OxygenOS 3.5.6 for OnePlus 2 is an leading update which rolls out in phase wise manner. Manually update Oneplus 2 to OxygenOS 3.5.7 or You can wait for the OTA updates.

Here we provide the OxygenOS 3.5.7 ROM which you can flash on your device. OnePlus 2 OxygenOS 3.5.7 update fixes missing IMEI issue. If you need to update your OnePlus to the modern version then Download OxygenOS 3.5.7 for OnePlus 2 .

Note:

• This method is only for the OnePlus 2.
• It will format your data, but still, we advise you to take a complete backup of your phone and then proceed.
• Make sure that your phone has at least 50-60% charged to prevent the accidental shutdown in-between the process.

Download OxygenOS 3.5.7 for OnePlus 2

• OxygenOS 3.5.7 Full ROM for OnePlus 2 – Download

How to Install OxygenOS 3.5.7 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.

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

3) Download the OxygenOS 3.5.7 for OnePlus 2 from above Copy ROM to a folder where adb installed.

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

5) Choose Install from ADB Sideload/USB

6) Now Connect your phone to Laptop/PC

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

8) Now check your connection by typing the below command

adb devices

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

9) Flash the OxygenOS 3.5.7 on OnePlus 2 by typing below command

adb sideload File Name.zip

10) Now wait until the process complete and then Reboot the phone.

11) Finished!

METHOD 2

1) Download the OxygenOS 3.5.7 OTA 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) Finished.

That’s all this is the complete guide to Download and install OxygenOS 3.5.7 for OnePlus 2.