: Once in Fastboot mode, use: fastboot flashing unlock (or fastboot oem unlock for older devices) .

Download the QPST tool suite and Qualcomm HS-USB QDLoader 9008 drivers.

Most manufacturers explicitly state that bypassing security parameters voids physical or software warranties. To help find the exact steps for your device, let me know: What is the exact make and model of your phone?

Download the latest Android SDK Platform-Tools on your PC. Step-by-Step Instructions Connect your phone to your PC via USB.

fastboot flashing unlock (or fastboot oem unlock on older models).

This method is most effective for stock Android devices, particularly Google Pixels, where the "OEM Unlocking" toggle is sometimes disabled only after the device connects to the internet or a mobile network.

Make sure you have installed Android Platform Tools correctly and that USB debugging is enabled on your device. On some devices, you may need to install additional drivers (Google USB Driver for Windows, or appropriate vendor drivers). Poor USB cables are another frequent culprit.

If your phone is carrier‑locked (for example, a T‑Mobile or Verizon device), you may need to SIM‑unlock it first before the OEM Unlocking toggle becomes available.