Use APKPure App
Get Set Only 4G Network Mode old version APK for Android
You can Select Only 4G Network Mode through this App .
By using this app you can set network mode to 4G . In the phone network mode there is no option to set only 4G . For this Reason it drops sometimes from 4G to 3G or 4G to 2G . To get the 4G experience you can try this App .