partial bootloader-unlock-custom-rom phone OnePlus lemonadep LE2120, LE2121, LE2123, LE2125, OnePlus 9, 9 Pro, OnePlus 9 Pro LE2120LE2121LE2123LE2125OnePlus 99 ProOnePlus 9 Pro

OnePlus 9 Pro

Phone · OnePlus

Partial Bootloader unlock + custom ROM

Difficulty

Moderate

Brick risk

Medium

Legal risk

Low

Not stock root. Needs an unlocked bootloader and a custom ROM.

Some carrier OnePlus units (T-Mobile/Verizon) are bootloader-locked and cannot be unlocked.

How-to

How to

Unlock the bootloader (fastboot flashing unlock / vendor unlock) and install a custom OS (LineageOS or Paranoid Android (AOSPA)).

Follow the specialist sources linked on this page. If this path is a jailbreak, unlock, or flash, the specialist wiki is the how-to — we do not copy those steps here.

Notes

Some TWRP and postmarketOS builds for this device are based on LineageOS device trees.

pmOS uses independent kernel (mainline or sm8350-mainline).

Install with fastboot.

SourcesLast verified Oct 31, 2026

https://wiki.lineageos.org/devices/lemonadep/ wiki.lineageos.org
https://gitlab.com/postmarketOS/pmaports/-/tree/master/device/testing/device-oneplus-lemonadep gitlab.com
https://github.com/AOSPA/ota/blob/master/updates/oneplus9pro github.com

Author canirootit research

OnePlus 9 Pro

How-to

How to

Notes

SourcesLast verified Oct 31, 2026

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