If it still shows "No," the device might be (e.g., Verizon/AT&T), and it cannot be unlocked. Method 4: Samsung "Download Mode" Unlock
Sony provides an official unlock website, but if the device menu says "No," the official site will not work. You must perform (SIM unlocking) to convert the status to "Yes" before using Sony's official unlock codes. Samsung (Knox & OEM Unlock) bootloader unlock allowed no to yes
| 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." | If it still shows "No," the device might be (e
On many modern devices (especially Google Pixel and Sony phones), the OEM Unlocking toggle will remain greyed out until the device connects to the internet and verifies its activation status with the manufacturer's servers. Insert a active SIM card, connect to a stable Wi-Fi network, and restart the device. Verified Methods to Change "No" to "Yes" Samsung (Knox & OEM Unlock) | Brand |
On many devices—particularly Sony Xperia devices and some older Motorola or Huawei models—the bootloader isn't just locked; it has a secondary security flag. This flag, often labeled "Bootloader Unlock Allowed," determines whether the user even has the permission to unlock the bootloader.
Manufacturers can detect modified bootloader flags, which typically voids any remaining hardware or software warranties. To help find the right strategy for your device, tell me: What is the exact brand and model of your phone? Which cellular carrier did the phone originally come from?