Sometime it is convenient to put one or more phone number in a black list in order to not be disturbed any more: too often now even a mobile number is used to forward commercial offers … and this is very very boring!
All smartphones have specific ways to do that and also in Windows 10 Mobile there is a way to do that very very easy … if you know how ;-)!!
If you go to Settings ->Telephone (IT: Impostazioni-> Telefono) and then in its section Predefined App (IT: App predefinite), you can see that there is a specific section that allows to specify the app you want to use to block and filter your incoming call/messages. By default it is listed the embedded app Block and filter (IT: Blocca e filtra) one (but further more could be available if you install other third-party app that can do that work). However, if you go in the app list, you won’t find an app with that name … because it is a feature embedded in the O.S. and so it is not listed! … this can be misleading …
However that this app exists can also be seen going to Settings -> Phone Calls (IT: Impostazioni -> Chiamate telefoniche) and then to its section where are listed the apps that are allowed to start a call (IT: Scegli le app che possono effettuare chiamate telefoniche)
Therefore: how to block a number for calls/messages? It is quite easy … from the Phone (IT: Telefono) app you have to touch and hold over the number you want to add in the black list (e.g. in the picture +39 02 9280 4999) and then select in the popup menù the Block number (IT: Blocca numero) item.
If you then click in the bottom menu of the Phone app you will find a voice menu to manage the blocked numbers (Blocked calls / Chiamate bloccate). Note that this menù item could not be available if no numbers were inserted in thet black-list.
For more information, see also this post .