Apple Music on new iPhone 15 pro works only at wi-fi

Apple Music on new iPhone 15 pro works only at wi-fi and doesn't work at LTE. A new iphone 15 was purchased and everything was transferred from the old phone to it. But the Music app does not work on the mobile Internet, but only on wi-fi. The subscription has been verified, and everything is fine with it. The reboot was done. Is it unclear what the problem is and how to solve it?