Flashing Guide - OnePlus Nord N10 5G (billie)

Prerequisites

Warning: Your warranty is void. Unlocking the bootloader and flashing custom software is done entirely at your own risk.

Before you begin:

• Your bootloader must be unlocked.
• A custom recovery (e.g. TWRP) must be installed.
• Make a full data backup — a clean flash will wipe everything.
• Ensure your device has at least 30% battery.
• Only flash files meant for OnePlus Nord N10 5G (billie).
• First boot may take 5–10 minutes. Do not interrupt or force reboot unless it exceeds 10 minutes.

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Unlocking the Bootloader

Unlocking the bootloader wipes all data on the device.

1. Enable Developer Options: go to Settings → About Phone and tap Build Number 7 times.
2. In Developer Options, enable OEM Unlocking and USB Debugging.
3. Reboot to fastboot mode:

   adb reboot bootloader
   

   Or hold Power + Volume Up while the device is off.

4. Verify the device is detected:

   fastboot devices
   

5. Unlock the bootloader:

   fastboot oem unlock
   

6. Confirm the unlock on-device using the volume keys and power button.
7. The device wipes and reboots. Complete the initial setup, then re-enable Developer Options and USB Debugging.

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Installing a Custom Recovery

1. Boot into fastboot mode.
2. Flash the recovery image:

   fastboot flash recovery recovery.img
   

3. Boot into recovery immediately to prevent OxygenOS from restoring the stock recovery:

   fastboot boot recovery.img
   

   Or hold Power + Volume Down at boot.

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Clean Installation

1. Boot into your recovery.
2. Go to Format Data → Confirm.
3. Select Apply Update → Sideload the ROM zip:

   adb sideload lineageos-*.zip
   

4. Reboot back into Recovery if flashing GApps, then sideload the GApps package (optional).
5. Reboot to System.

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Update (Dirty Flash)

Method 1: OTA Update

1. Go to Settings → System → System updates.
2. Download the latest available build.
3. Tap Reboot once the download finishes.
4. The device reboots into recovery and installs the update automatically.
5. Reboot to System.

Method 2: Recovery Flash

1. Reboot to Recovery.
2. Select Apply Update → Sideload the ROM zip.
3. Reboot to System.

Note: For vanilla builds, GApps must be reflashed after every update.

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Device Info

Field	Details
Codename	billie
SoC	Qualcomm Snapdragon 690
Android	10 (launch)
RAM	6 GB
Storage	128 GB (UFS 2.1)