4G OTA/Message/URL Setting Send to Mobile to Select 4G Network

We required to develop a 4G / VoLTE Enable settings which push to handset thru anyway… send a OTA message, Notifications or send a link to click and change mobile 4G network settings. many customers don't understand how to turn N 4G settings in their phones so we want an automatic tool / url /OTA message which help customer on single click .