Some manufacturers allow bootloader unlocking without a SIM.
Many manufacturers allow unlocking via a fastboot command and an unlock code from their site. SIM not required. how to unlock bootloader without sim card
Notes: Some OEM portals require an account and device identifiers only — no SIM needed. Some manufacturers allow bootloader unlocking without a SIM
Best for: MediaTek (MTK) and some Qualcomm devices where OEM unlocking is grayed out without a SIM. Notes: Some OEM portals require an account and
The exact steps vary by manufacturer (Google Pixel vs. Samsung vs. OnePlus vs. Xiaomi), but the general workflow is as follows.