Data Switch Pro (com.tomatox.dataswitchpro) on Google Play
Turn on/off mobile data (cellular data/2G/3G/4G) from a widget, a simple shortcut, or the notification window. Save battery or prevent being charged for data by turning it on/off only when needed.This uses a direct method of turning data on/off and does not change the APN settings.Works with Android 2.1 (Eclair), 2.2 (Froyo), 2.3 (Gingerbread)+.Notes:* Be aware that if you used another app that changes the APN to turn off data, you will need to use the same app to turn it back on.* In Android 2.1 & 2.2, if you're currently connected via WiFi, it may detect the mobile data as disabled.[dataswitch]