Se Bootloader Unlocking Relocking 1662 Patched ((install))
This article is designed for technical enthusiasts, developers, and advanced users dealing with bootloader restrictions, particularly in the context of Xiaomi’s HyperOS/Old MIUI, or similar locked-down Android environments (like Sony or Motorola) where "1662" has become a notorious error code.
: Unlocking a bootloader generally compromises the device's hardware-backed security, potentially disabling features like DRM keys (used for camera enhancements or premium video) and increasing the risk of unauthorized firmware access. Hacker News Technical Status se bootloader unlocking relocking 1662 patched
- Restore stock firmware exactly matching bootloader expectations (same bootloader/partitions versions).
- Use fastboot relock command:
fastboot oem lockorfastboot flashing lock. - For devices with relock token requirements, provide token or use vendor tool.
- After relock, perform a factory reset if prompted.
This type of unlock is rarely official. It’s typically achieved using leaked factory tools, patched bootloader binaries, or hardware exploits (e.g., EDL firehose loaders). This type of unlock is rarely official
A modified bootloader or unlock tool that previously bypassed the 1662 error has now been blocked by a security update. patched bootloader binaries
Unlock: In the tool, click Unlock BL. The process is automatic and takes a few seconds. 🔒 How to Relock
Relocking a bootloader is possible but dangerous if not done correctly:
Historically, you could attach a Mi Account to a phone, wait 7 days (168 hours), and unlock. The "1662 patch" changed that. Manufacturers realized that resellers were bulk unlocking phones to install adware or fake global ROMs.
