Overview

• One UI 8 removes the OEM Unlocking toggle from developer options on Galaxy Z Flip 7, Z Fold 7 and S25 series devices globally
• XDA Developers and SammyGuru code dives reveal the firmware defaults “ro.boot.other.locked” to 1 and strips out all unlock logic
• Owners report that updating previously unlocked phones to Android 16-based One UI 8 automatically re-locks their bootloaders
• Without a user-accessible unlock option, custom ROM installation, rooting and custom kernel use are no longer possible on One UI 8 devices
• Samsung has offered no official explanation or timetable for restoring bootloader unlock functionality