Overview

Chinese OnePlus 15 models ship with ColorOS and regional locks. This guide covers unlocking the region/SIM and flashing the global OxygenOS ROM.

Step 1: Regional SIM Unlock

Official Method

Request a remote unlock through OnePlus support:

  1. Use the 一加社区 (OnePlus Community) app
  2. Request region unlock in Remote diagnostics
  3. Receive unlock code and apply remotely

Detailed guide by kpgc10kai

Verify Region Status

Check region code (should return 2):

*#*#3932433284#*#*

IMEI verification: https://support.oppo.com/cn/check/

Step 2: Bootloader Unlock

Enable Deep Testing

Download the deep test APK to enable OEM unlock:

Wait 1-2 days for deep testing approval.

Deep Testing Approval

Unlock Bootloader

⚠️ Warning: Locking and Unlocking booloader will wipe all device data

adb reboot bootloader
fastboot flashing unlock

Bootloader Unlocked

Detailed XDA forum guide

Step 3: Flash OxygenOS ROM

  1. Download and unzip the global ROM
  2. On macOS: ensure Android Platform Tools is installed and update fastboot path in ./Super_Flasher.sh file
  3. Reboot to bootloader and run flasher:
adb reboot bootloader
./Super_Flasher.sh

In Fastbootd: Select English → Continue script (skip format/reboot prompts on device)

When prompted: Format data? → yes

Step 4: Lock Bootloader

Sync OTA updates twice before re-locking:

Sync OTA

adb reboot bootloader
fastboot flashing lock

Resources