Disabling sound for lost and recover signal

[Witt]

I'd like to now how to remove the sound that plays everytime when I get in and out of a cell phone network.
I have a Z1 with Android 5.1.1.

Thanks

[_alexdon_]

I am not sure you can, see this:

/t5/Xperia-Z3/Z4-Signal-Loss-Vibrate/m-p/1047432#U1047432

[Witt]

I can't believe that Sony could do something like this. Its too much stupid to be desired. It's probably a bug. I want to believe on it. Please Sony, fix it.