Call Firewall basically rejects unwanted call , it acts a call and SMS filter program and based on the rules set by the used it can reject incoming calls and sms . It can also enable call barring. Imagine you have this really annoying friend and don’t wanna attend his/her call , then you set that persons number in Black list and as soon as they call you the call disconnects. It also lets you reject a call with a predefined SMS , which is sent to the caller.

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