11 Cell Network Changer — Open Source Productivity App

Cell Network Changer opens the Android Phone info menu letting you change your cell network type. You can force your phone to use any network type. You can see information about your phone's sim card and cellular data. You can also run a ping test on your phone.

This works on Android 11 and newer. You can also simply dial *#*#4636#*#* to open the same menu, which works at least on Android 2.3 and higher.