SPAM firewall is a service that resides on a mobile carrier network and helps protect end users from SPAM calls and SMS messages. With this service the end user gets the option to effectively block unwanted incoming calls and messages in an automated way, at the same time keeping the ability for expected and approved callers to reach the subscriber
This is a service for mobile carriers that helps generate additional revenue on the existing user base
This can be any person, but normally a mobile number gets into spammers database after publication on some public message board, or after a leak from a bank or insurance company.
Such leaks happen everyday in every country.
Right after a person makes his or her contacts public (which happens often when one uses online classified) spammers gather this data by using automated parsing scripts.
After that these contacts are sold to various call centers which then abuse these contacts with unwanted calls and messages.
There are people whose job is to take calls from unknown people (whether one is a small business owner or a sales person).
On the one hand such people cannot stop answering calls from unknown numbers, but on the other hand they are more than anyone else are abused by call centers, telemarketing campaigns, even by marketing robots. As a result the efficiency of their work is significantly decreased.
The end user configures the major service parameters via a mobile app (PIN codes, calls filter that have to pass through the firewall). The app can be either standalone or be supplied as an SDK to be incorporated into existing end user selfcare portal
When a new call comes in - the service checks if the user is subscribed to our service or not
If yes, then, the mobile core redirects that call to an application server (which is our product)
The application server fulfils the required scenario of call handling
Both Android and IOS devices have inbuilt “do not disturb” option. This option normally helps to secure your comfort for a certain period of time, allowing calls and messages from a closed group of contacts. But it does not help to effectively split unwanted and desired incoming calls.
Every mobile phone has an option to block certain calling party numbers. Unfortunately, this only help post factum, after an unwanted call has been answered and finished.
Certain people simply do not answer calls from unknown number. This is also an option, but definitely not for everyone.