No more auto switch between 4G/3G/2G! This app lets you access the hidden RadioInfo settings on your phone. Then you can switch network mode such as,
-LTE only (4G only)
-WCDMA only (3G only)
-GSM only (2G only)
-NR only (5G only)
-or any combination between them.

You can not make calls over 4g signal, in order to make calls over 4g you have to turn on VOLTE on your phone.

*Specialties of this app,
-It's Ads free
-Very light weight
-No any app permission is required.

Please note that this hidden settings are not available for every phone. If so, the application does not work. It depends on your phone. Simply install the app and check.