Unlocking an Android bootloader without a SIM card depends heavily on the manufacturer and model. For many devices, like those from
: Sign out of Google and manufacturer accounts to avoid Factory Reset Protection (FRP). how to unlock bootloader without sim card
Unlocking the bootloader almost certainly voids your manufacturer’s warranty. Some manufacturers (like OnePlus and Google historically) have been flexible about this, but don’t count on it. Unlocking an Android bootloader without a SIM card
The approach you take will largely depend on your specific phone model and the nature of the block (broken hardware vs. software restriction). The following table summarizes the primary strategies: how to unlock bootloader without sim card