Switch Network Type 2G / 3G is Tools Apps for Android By SoftXperience.
download latest version of Switch Network Type 2G / 3G Apk v1.0.4 for android from GlobalAPK with direct link.
This app/shortcut opens directly the settings app of mobile network settings to switch between "2G" and "allow 3G" networks (e.g. to save battery). A direct switch is sadly not possible.
It places also a shortcut in the statusbar to reach the settings from everywhere.