Call Blacklist Pro

Call Blacklist is an application that allows you to block unwanted Calls from given numbers. For your convenience, the application leaves no trace of the blocked calls except for the internal log, which is available in the application.
As a result, you will not receive any notification or a registry entry, while you will be still able to check you log of blocked traffic inside application.
App is also capable of blocking restricted numbers.

Features:
- blocking incoming calls from given number
- blocking incoming calls from restricted numbers
- blocking numbers chosen from the address book
- blocking numbers chosen from the call log
- exporting the list of blocked numbers to a file
- importing the list of blocked numbers from a file (previously exported)
- grouping numbers - the creation of new, deleting and category management, moving numbers between categories, activation/deactivation whole category

Permissions explanation:
- read, modify or delete the contents of your USB storage - used to export/import backup copy of blacklist
- Read phone status and identity - used to detect event of incoming call
- Directly call phone numbers - used to reject calls from blacklisted numbers
- Read your contacts - used to allow adding numbers from contacts
- Write contact data (only for Android earlier then 4.1) / Write call log (only for Android 4.1 or later) - used to delete blocked numbers from call log
- Read call log - used to allow adding numbers from call log

Try also 2 in 1 Call and SMS Blacklist http://play.google.com/store/apps/details?id=pl.emerger.numberblacklist