What happens when others land on the path and run to other equipment?

Hello, I'd like to ask someone what happens when they log in to the trail and switch to other equipment. Others log in to the trail and change to other devices to log in normally. When someone logs in to the trail music run and logs in with other devices, they need to bind the SMS verification code of the mobile phone, but the trail music run is only bound three times. You can't change it after more than three times.