Используйте приложение APKPure
Историческую версию Switch Network можно получить на Android
Переключить сеть 2G 3G 4G
This app adds an icon on status bar that is a shorcut to Mobile Network settings to switch between 2G/3G/4G network types. The shortcut can save two clicks to open Network mode dialog. Switching to 2G improves battery life.