How To Unlock Bootloader Without Sim Card [new] May 2026

Unlocking a bootloader without a SIM card depends heavily on your device manufacturer. While many devices like Google Pixels and older Samsungs allow this with just a Wi-Fi connection, others like Xiaomi have strict requirements that typically demand a SIM card for account binding. Manufacturer-Specific Requirements The ability to unlock without a SIM card varies:

Google & OnePlus: These devices generally do not require a SIM card. You only need to enable OEM Unlocking and USB Debugging in Developer Options while connected to Wi-Fi.

Samsung: Modern Samsung devices often require an active internet connection (Wi-Fi is usually sufficient) for the OEM Unlocking toggle to appear in Developer Options. Some users have found that checking for software updates over Wi-Fi can trigger this toggle if it is hidden.

Xiaomi/Redmi/Poco: 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)

If your device does not strictly require a SIM for account verification, follow these general steps:

Enable Developer Options: Go to Settings > About Phone and tap Build Number seven times. how to unlock bootloader without sim card

Toggle Settings: In Settings > System > Developer Options, enable OEM Unlocking and USB Debugging.

Connect to PC: Use a high-quality USB cable to connect your phone to a computer with ADB and Fastboot tools installed. Enter Fastboot/Download Mode: For most: Run adb reboot bootloader.

For Samsung: Power off, then hold Volume Up + Volume Down while plugging in the USB cable to enter Download Mode.

Run Unlock Command: In your PC terminal, type fastboot flashing unlock or fastboot oem unlock.

These guides provide visual walkthroughs for unlocking bootloaders across various Android manufacturers: Unlocking a bootloader without a SIM card depends

8. Common Errors & Solutions

| Error | Cause | Fix | |-------|-------|-----| | oem unlock is not allowed | SIM verification required | Use exploit method or borrow a SIM temporarily | | remote: Command not allowed | Carrier-locked device | Unlock carrier SIM first (use paid service) | | Device has timer remaining | Anti-theft timer | Keep Wi-Fi on & device awake for 72h | | fastboot not recognized | Drivers missing | Install Google USB drivers or manufacturer drivers |

Method 4: OnePlus – Fastboot Commands Only

OnePlus (pre-Oppo merger, before 2022) was the most developer-friendly brand. No SIM card is ever required.

Steps:

  1. Enable Developer Options → OEM Unlocking → USB Debugging (Wi-Fi is fine).
  2. Reboot to Fastboot: adb reboot bootloader
  3. Run: fastboot oem unlock
  4. Or on newer OxygenOS 12+: fastboot flashing unlock

That’s it. OnePlus does not phone home to a server for permission. If your specific OnePlus model (e.g., T-Mobile branded) requires a SIM, see Method 7 (EDL).

Method 5: Realme & Oppo – Deep Testing without Carrier

Realme and Oppo use a "Deep Testing" app to request unlock approval. The app usually checks for a SIM card, but you can bypass this. Enable Developer Options → OEM Unlocking → USB

SIM-less Bypass:

  1. Download the Deep Testing APK from the Realme/Oppo community website using your PC.
  2. Transfer via USB cable (no SIM needed).
  3. Install the APK – it will initially fail saying "Please insert SIM."
  4. Workaround: Go to Settings > App Management > Deep Testing > Clear Data.
  5. Turn on Airplane Mode.
  6. Open Deep Testing again – the SIM check will be skipped (bug in older versions).
  7. Submit your unlock application – wait for approval (usually hours).
  8. Once approved, reboot to fastboot and run fastboot flashing unlock.

If the bug is patched, you must borrow a SIM from a friend for exactly 2 minutes to register the app, then return it.

Method 1: Standard Fastboot Unlock (No SIM Required)

Some manufacturers allow bootloader unlocking without a SIM.

Step 3: Boot into Bootloader/Fastboot Mode

You can do this without a SIM card installed.

  1. Turn off the phone.
  2. Connect the phone to a PC via USB cable.
  3. Press and hold the specific hardware key combination (usually Volume Down + Power) to boot into Fastboot/Bootloader mode.
    • Alternative: If the phone is on, you can use an ADB command: adb reboot bootloader.

5. Method 2: Using MTK or Qualcomm Exploit Tools (No SIM, No Account)

Best for: MediaTek (MTK) and some Qualcomm devices where OEM unlocking is grayed out without a SIM.