A free app for Android, by diewland.

This tool app gives you a shortcut to Mobile Network in Wireless and network settings.

With this app, you can set your options in your network settings to save battery and consumed data. You can turn on and off your data roaming connection. When it is turned on, you will be able to connect to data services

From these settings, you can select your preferred network type, either 4G, 3G, 2G, and so on…

You will also be able to view your access point names and modify them. You can also select which operator and enable your data access.

Download this app on your device now.