Use APKPure App
Get 4g only old version APK for Android
강제 LTE 4g 전용 (ANDROID 11,12 (S) 지원됨)
*You can force LTE only to surf internet in high speed or for better gaming experience.
*size of app is less than 3 Mb.
*There are no advertisement in app.
*Open notification log to check deleted messages and Notification.
*You can get premium version to access extra features like toggle option to set main screen as 4g setting so you do not have to come to the app every time to change 4g Setting.
*premium is one time purchase to access premium features.
*For more details check instruction tab in app.