.

Similarly one may ask, can you block calls from unavailable?

Number from the Android Market. Touch “Blocklist,” then touch “Add More to List” under “Block These Numbers.” Touch “All Private/Blocked Numbers” to block all unavailable calls to your phone.

why does an unavailable phone call mean? Cell phone calls designated as "Unavailable" on a phone's caller ID are placed from an area or region from which your wireless service provider or phone company is unable to retrieve a phone number. A "Restricted" phone call comes from a caller who has specifically blocked your phone from identifying his number.

In this manner, can you block a restricted number on your cell phone?

Usually, there are blocking options on any cell phone. They are under “Security” or “Settings”. Some phone models allow to block or restrict particular types of incoming calls. If you're not sure about blocking features, call the manufacturer support staff.

Why does a mobile phone say unavailable?

it means that the network knows the phone but cannot reach it either because it is switched off or when it is outside the coverage zone of the provider and roaming is switched off or in a rural area without coverage. It may also be that you are blocked by the subscriber.