Telemarketers, collection agents.
Usually it's the account, not the computer.
When one is referring to using a new proxy, one is usually referring to using a new online server or connection. Changing a proxy is usually done to access sites that have otherwise been blocked.
There are mobile applications that allow blocked calls to be unmasked. TrapCall is a mobile app that not only unmasks blocked and restricted numbers, but also records incoming calls.
Yes.
TCP is a protocol that uses those.
they are phone numbers that are blocked by the caller so that the person the caller is calling won't know who is calling them.
usually it says it is unknown textmessage
its call a blocked.
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Call your phone company and ask them how to get the unwanted numbers blocked. Be aware that they will probably charge you a fee for blocking the numbers.
Blocked numbers are in the settings. They also can be called black listed numbers, locate them and then unblock the number.
Enter random numbers at the PIN screen till it's blocked