This is the most common method for devices still on Android 10 or early Android 11 builds.
Guaranteed to work, but the MSM tool is hard to find and region-specific. Download only from official OnePlus support forums. oneplus ac2003 frp bypass
You will need a stable Wi-Fi connection. The initial setup process requires internet access to check for updates and verify accounts. An unstable connection can cause the "Checking for updates" screen to hang indefinitely. This is the most common method for devices