Stolen phone

If it is signed out of your Apple ID you can’t block it. See→If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

You can ask your carrier to blacklist the IMEI, but that won’t prevent someone from using it on Wi-Fi or shipping it somewhere that doesn’t honor the blacklist.

I don’t understand your question.

If your service provider won’t block your IMEI there is nothing that you can do.