Unlocking the bootloader of an Android device is the crucial first step toward flashing custom ROMs, installing custom recoveries, or gaining root access. However, many official unlocking methods—most notably from manufacturers like Xiaomi, Redmi, and Poco—strictly require a SIM card with cellular data to bind the device to an official account.
One of the biggest misconceptions is confusing SIM carrier locks with bootloader locks. (allowing the device to work with any carrier) and bootloader unlocking (allowing system modifications) are two completely different things. Unlocking the bootloader does not SIM‑unlock your device, and vice versa. how to unlock bootloader without sim card
Method 2: Bypassing Xiaomi's SIM Requirement (Mi, Redmi, POCO) Unlocking the bootloader of an Android device is
Attempt to bind your account. If it fails, you may need to use a SIM card temporarily just for binding, or use a third-party tool, though, for security, using a SIM briefly is highly recommended over unofficial tools. (allowing the device to work with any carrier)
Hold both keys on your phone simultaneously, then plug in the USB cable.
Wi-Fi connection and removal of Samsung/Google accounts for safety. OnePlus / Nothing Standard ADB/Fastboot commands via PC. Xiaomi / Redmi / Poco Active SIM and mobile data for account binding. General Method (No SIM Required)