How To Unlock Bootloader Without Sim | Card
T-Mobile variants require an unlock token file downloaded from OnePlus after an automated approval phase. Critical Risks and Caveats
Paradoxical but useful if you previously unlocked with a SIM and now need to re-lock/unlock without one.
Go to and tap Add account and device .
Before we dive into the process of unlocking the bootloader, it's essential to understand what a bootloader is. A bootloader is a piece of software that loads the operating system into memory when a device is powered on. It's a critical component that ensures the device boots up correctly and loads the necessary software. The bootloader is usually locked by the manufacturer to prevent users from making unauthorized changes to the device. how to unlock bootloader without sim card
Open a command prompt in your platform-tools folder and type: adb reboot bootloader .
These tools are often used by repair shops and can be found online. They usually connect to your phone via USB and automate complex ADB and Fastboot commands.
Community-developed tools like MTKClient can sometimes bypass the official server checks for older MediaTek-based Xiaomi devices. T-Mobile variants require an unlock token file downloaded
These are the most restrictive. Official methods typically require a valid SIM card with mobile data to bind your Mi Account to the device. However, some unofficial tools or specific legacy methods might bypass this. General Steps (No SIM Required)
For devices with Unisoc (formerly Spreadtrum) chipsets, there is a dedicated Python tool called unisoc‑unlock that can lock or unlock the bootloader using its Identifier Token. No SIM card is required for this process.
No matter which method you pursue, you’ll need the following: Before we dive into the process of unlocking
Go to Settings > About Phone > Tap "Build Number" or "MIUI Version" seven times.
If adb devices works but fastboot devices returns a blank line, your PC lacks the correct fastboot interface drivers. Fix this by opening on Windows, locating the Android device showing a yellow exclamation mark, right-clicking it, selecting Update Driver , and manually pointing it to your extracted OEM or Google USB driver folder.
You can bypass this requirement using several proven workarounds. Step 1: Enable Essential Developer Options