Use APKPure App
Get 2G-3G-4G Shortcut old version APK for Android
선호하는 네트워크 유형 설정에 대한 빠른 액세스에 대한 바로 가기.
This shortcut takes you direct to the mobile network settings on your phone. There you can choose your preferred network type (see screenshot). Using this application helps you to get a faster access to this setting.