Force 4G/5G Only will help to change network to 5G/4G/3G. it can opens a secret menu where advanced network configurations can be selected. 5G feature only support Phone with 5G Hardware

Features :
*Change network to "4G/5G Only" mode
*Lock to any particular Network Signal like 5G/4G LTE/3G only
*Dual SIM Support
*Advanced network statistics

Force 4G/5G Only not working on every phone. Some phone brands block opportunity to force switch network.
5G feature only support Phone with 5G Hardware.