How To Unlock Bootloader Without Sim Card New!
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.
Hold down both the Volume Up and Volume Down buttons simultaneously while plugging the phone into the computer.
It stops resellers from mass-unlocking devices to flash unauthorized or ad-heavy software before selling them to consumers.
Before seeking workarounds, it's essential to understand why a SIM card is typically mandatory. The requirement usually stems from one of two places: how to unlock bootloader without sim card
Xiaomi officially requires a SIM card with mobile data to "bind" your Mi Account to the device. If you cannot use a SIM, your options are limited:
Once there was a developer named Leo who picked up a sleek, "carrier-locked" smartphone from a second-hand shop. It was the perfect hardware for his custom ROM project, but there was one catch: the device refused to let him toggle the "OEM Unlocking"
Disconnect and turn on the phone; the bootloader will now be unlocked without any carrier verification. Method 4: Samsung Devices via Download Mode This is often enough to unlock a bootloader
Go to Settings > System > Developer Options . Turn on OEM Unlocking and USB Debugging .
However, some manufacturers (most notably Xiaomi) have implemented account-binding security measures that typically require a SIM card to verify your identity before granting an unlock. Understanding the Difference: Bootloader vs. SIM Unlock
Connect to a PC and use the command: fastboot flashing unlock or fastboot oem unlock . Method 4: Using Mediatek (MTK) Client Tools It stops resellers from mass-unlocking devices to flash
| Approach | Description | Best For | | :--- | :--- | :--- | | | A minimal initial setup without Wi-Fi or SIM to keep OEM Unlocking accessible. | Basic Pixel and generic Android devices. | | Using Specialized Unlocking Tools | Third-party software like Haafedk GSM Tool that can bypass FRP or unlock bootloaders. | Broad compatibility; often involves a cost. | | Official Channels (with Proof of Purchase) | Directly contacting the manufacturer's support to request a remote unlock. | Users with broken SIM slots who can prove ownership. |
Verify the connection by typing: adb devices (Accept the debugging prompt on your phone screen if it appears). Boot your phone into Fastboot mode: adb reboot bootloader
If it remains greyed out, reset the network settings: Go to Settings > System > Reset options > Reset Wi-Fi, mobile & Bluetooth , then reconnect to Wi-Fi.