– On certain devices, you can force the flag to yes using:
Some Sony users have reported that certain security applications can artificially trigger a "No" status in the service menu. bootloader unlock allowed no to yes
Manufacturers lock bootloaders primarily for security and carrier subsidies. Unlock physically impossible
| Brand | Models with Permanent "No" | Reason | | :--- | :--- | :--- | | | All Snapdragon S20, S21, S22, S23, S24 series | Qualcomm Secure Boot + Knox fuse. Unlock physically impossible. | | Motorola (Certain carriers) | Verizon Moto G series, AT&T Moto Z | Carrier command lock. | | Huawei (Post-2018) | All Kirin 970+ devices | Bootloader unlocking servers shut down by government order. | | Google Pixel (Verizon) | Pixel 3, 4, 5 (Verizon SKU) | Separate eFuse. Unlockable only via paid exploit (rare). | | OnePlus (T-Mobile) | OnePlus 8/9/10 T-Mobile variant | Carrier permanently disables the "Toggle." | | | Google Pixel (Verizon) | Pixel 3,
devices—typically those sold through specific carriers (like Docomo, Softbank, or Verizon)—and officially signifies that the device cannot be bootloader-unlocked.
The most common way to flip this status is through third-party services that use proprietary "S1 Unlock" tools.