TrueCaller is an app for smartphones
that shows the user who is calling when they call, even if the caller
is not in user's address book. It gives you information about callers
who are beyond your address books like marketers and spam callers. It
can also block unwanted calls, preventing you from being disturbed
with unnecessary call rings. The app is becoming quite popular with
dozens of millions of users. It is quite efficient in identifying and
eventually blocking unwanted calls and in matching names and numbers
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