This doesn't scale, if we need to add functions here, I would like to keep this file just for listen to changes to mcc/mnc and deal with the configuration, we should do decouple the configuration from the actions.

For example we could have that switch, but send custom events to someone that listens to `wallpaper` events.

Soon we will need to add default contacts by mcc/mnc and the code will grow, same for other things, perhaps that code doesn't need to be all together, we could separate the different functions in different files, and keep this as the single point for dealing with configuration data.

What do you think?