Many modern phones, like the ones blessed with Android 2.2 or above, have a simple option available to them in the Settings, which can add callers to a blacklist.
However, if you want a bit more control than this option offers, there is no choice but to install a third-party solution from the Android Market… but don’t worry, as there are plenty of apps available that deal with this issue.
We take a look at one such app called Call Guard. This has a fair amount of functionality on board, such as SMS blocking, call blocking (both incoming/outgoing) and filtered blocking. This last option enables you to custom define what happens to your received calls on certain times and days of the week.
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How to Block Unknown Callers on Android part 2
This How to Block Unknown Callers is taken from :
From : Android Tips, Tricks, Apps & Hacks 2 © 2012 Imagine Publishing Ltd