The 1662 patch is a sign of the times. Android is moving toward a "Bootloader as a Service" model. Google is testing for Android 16, where unlocking requires a physical hardware keypair generated at the factory.
: Unlocking these devices often results in the permanent loss of unique Sony features. Historically, this included se bootloader unlocking relocking 1662 patched
Manufacturers and carriers have cited "device integrity" and "user data protection" as the primary reasons for the 1662 hardening. By ensuring the bootloader cannot be toggled at will, they prevent attackers from physically accessing a device and side-loading malicious firmware to bypass encryption. What This Means for You The 1662 patch is a sign of the times
: This string is often linked to tools designed to either bypass factory security to a bootloader (allowing for custom ROMs or rooting) or to : Unlocking these devices often results in the
, the bootloader is hardware-locked and cannot be unlocked through standard methods. developer.sony.com 2. Unlocking the Bootloader
Check the Sony Developer Portal to see if your IMEI is eligible. If "Bootloader unlock allowed" is No , Sony will not provide an unlock code.