Modifying a hard-locked bootloader carries inherent risks that you must consider before proceeding:
But there’s a terrifying message that can stop you cold in the developer options:
How to unlock and re-lock the bootloader - Support - Fairphone
Sometimes, the bootloader is allowed, but the setting is disabled. bootloader unlock allowed no to yes
However, if you just want to remove bloatware or change minor system settings, unlocking your bootloader is probably overkill. The security risks, warranty implications, and potential for bricking make it an unwise choice for casual users.
Go to Settings -> About Phone -> Tap "MIUI Version" 7 times.
These procedures wipe all user data. Always back up your photos, contacts, and documents before modifying system partitions. Summary Table of Methods Difficulty Success Rate Risk Level Official SIM Unlock Firmware Downgrade Low (Depends on OS version) Third-Party Services Paid ($20-$50) EDL / Test Points High (Physical Damage) Go to Settings -> About Phone -> Tap "MIUI Version" 7 times
Knowing the model and carrier (e.g., Xperia 5 IV Go to product viewer dialog for this item.
Because this restriction is enforced at a low system level, there is no universal button to flip the switch. The fix depends entirely on your phone's manufacturer, chipset, and software patch level.
However, simply toggling the switch is often not the end of the story. Many manufacturers impose additional waiting periods or conditions before the system will fully acknowledge the "OEM Unlocking" status. Summary Table of Methods Difficulty Success Rate Risk
When your Android device (specifically Sony Xperia models) displays "Bootloader unlock allowed: No"
The device is ready to be unlocked via fastboot commands.
security app in settings immediately changed the status to "Yes" in the service menu. Remove Accounts: