When you factory reset a phone, by default, after the phone boots up, it will prompt you to set a password. (Screenshot taken from a 6851).

There are two ways of disabling the above prompt. You can set the parameter from DMS, or you can set it manually on the Phone Web UI. Follow the below instructions
- To disable using the provisioning server, set the below parameter to “No”:
<User_Password_Prompt ua="na">No</User_Password_Prompt>
- To disable via the Web UI, navigate to http://IP_ADDRESS_PHONE/admin/advanced
- Go to Voice --> System and set User Password Prompt to No
