Instructions :

1. Jailbreak with checkra1n for iOS12-15 or use tool to Jailbreak with iOS15 ( hello screen only)
2. Connect to wifi and go to the activation page with login/ password 
 3. Connect to SMD
 4. Verify the ability to bypass “Your device is supported” message (mandatory)
 5. Copy SN and register into device field
 6. Open SMD and Choose checkboxes if you wish
 7. Press Activate 

Need to do strictly with these steps !!
You can’t register into the database before you connect the device to SMD Tool for verification. 

Device must be restored to Hello mode

Download Link

refund policy 
https://www.iosfiles.com/terms-of-refund