While most modern Android devices allow you to unlock the bootloader without a SIM card, some brands (like Xiaomi) traditionally require one for account verification.
Go to Settings > System > Developer Options and toggle to "On". how to unlock bootloader without sim card
Connect the phone to a PC. Using a terminal, run adb reboot bootloader followed by fastboot flashing unlock . 2. Xiaomi, Redmi, & Poco (SIM Usually Required) While most modern Android devices allow you to
An ideal system would allow users to unlock their bootloader without a SIM or active cellular connection by using a pre-generated, device-specific token. Using a terminal, run adb reboot bootloader followed
This comprehensive guide will explore the relationship between SIM cards and bootloader unlocks, provide step-by-step methods for major manufacturers, and troubleshoot common issues—all without the need for an active cellular connection.
Xiaomi is the most restrictive brand regarding SIM cards. Their official Mi Unlock tool mandates that you "bind" your Mi Account to the device using only; Wi-Fi is not permitted for this step.
seven times until you see a "You are now a developer!" message. Toggle OEM Unlocking : Navigate to Settings > System > Developer Options . Connect to , then toggle on OEM Unlocking USB Debugging Use ADB/Fastboot : Connect the phone to a PC. Open a command prompt and run: adb reboot bootloader fastboot flashing unlock fastboot oem unlock for older models). Manufacturer-Specific Obstacles How to unlock Xiaomi Redmi 4X without permission