At least right now, the "Unlock SIM" menu entry is in the network indicator menu - and the network indicator service monitors the cellular connection - and it's that service that will trigger the SIM PIN dialog.
If it's the System Settings that will trigger the dialog, it's System Settings that needs to provide the labels - unity8 should have no knowledge of those strings.
"We" are unity8.
At least right now, the "Unlock SIM" menu entry is in the network indicator menu - and the network indicator service monitors the cellular connection - and it's that service that will trigger the SIM PIN dialog.
If it's the System Settings that will trigger the dialog, it's System Settings that needs to provide the labels - unity8 should have no knowledge of those strings.