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Once the process completes, type fastboot reboot to restart your device. Brand-Specific Workarounds Without a SIM Card
This is often enough to unlock a bootloader that's locked by a carrier. Even a phone reported as "financed" or "software-locked" by a carrier has had its bootloader unlocked using this exact offline method.
If you follow the appropriate method for your specific brand, you will never need to borrow a friend’s SIM card again. how to unlock bootloader without sim card
Turn off Wi-Fi and turn on the mobile data provided by the eSIM.
: You only need the SIM to initiate the "Add account and device" step in settings. You can remove it immediately after the account is successfully bound and wait the required period (usually 168 hours) using Wi-Fi. Once the process completes, type fastboot reboot to
Execute the universal unlock command: fastboot flashing unlock (Note: For older legacy devices manufactured before 2015, the command may be fastboot oem unlock )
Move all essential photos, documents, and accounts to a secure cloud backup or external hard drive. If you follow the appropriate method for your
If you’ve tried all the methods above and still can’t enable the OEM Unlocking toggle, your device may be permanently carrier‑locked or a model that simply doesn’t support bootloader unlocking. In that case, your best options are to either accept the locked state or consider purchasing an unlocked device specifically for custom development.