The tool will restore the original TA partition settings, restoring the "Locked" status. Frequently Asked Questions (FAQ) What is the "167z" command?
If your device is eligible, follow these steps to obtain an official unlock code:
Hold the (usually Volume Up or Search button, depending on the model) and connect it to your PC via USB. The LED should turn Blue , indicating Fastboot mode.
: Open a command prompt and run: fastboot -i 0x0fce oem unlock 0xYOURKEY (Replace YOURKEY with the code from Sony). Step 3: Relocking the Bootloader (Verified Method) Unlock bootloader | Developer World se bootloader unlocking relocking 167z verified
This tool was widely used for 2011-era Xperia phones (like the Xperia Arc or Neo) to bypass official restrictions, especially on carrier-branded units.
If it states Bootloader unlock allowed: No , an exploit-based service tool or Testpoint bridge is mandatory to flip the security flag. Step 2: Extract Your IMEI Code Type *#06# into the dialer. Write down the 15-digit code string exactly as displayed. 🔓 How to Unlock the 167z Bootloader
For devices: ✅ Unlock – safe and community-approved. ⚠️ Relock – possible but only on full stock firmware; high risk if you’re unsure. The tool will restore the original TA partition
The string likely refers to a software branch (e.g., V12.5.167z or Build 167z-release-keys ). The "Verified" suffix confirms that the boot process runs Android Verified Boot (AVB) 2.0 or higher with:
The biggest hurdle in 2026 is OS compatibility. Windows 10 and 11 require Disabled Driver Signature Enforcement to recognize the "S1 Boot Fastbreak" drivers. 📋 The Verified Process (High Level)
[Device Power Off] ──> [Hold Volume Key] ──> [Connect USB Data Cable] ──> [Fastboot / Flashmode Active] The LED should turn Blue , indicating Fastboot mode
(bootloader) unlocked: no (bootloader) verity-state: green (locked & verified)
Unlocking permanently trips the security flag.
Connect your device via Fastboot and run: fastboot oem unlock 0x[YOUR_KEY]
To unlock or relock the bootloader on Sony devices, particularly legacy Sony Ericsson models and modern Xperia phones, you must first verify eligibility and back up critical system data. The "167z" identifier typically refers to specific software revisions or bootloader versions found in legacy Sony Ericsson devices like the Xperia S or Ray.