Compatible with iOS 11.

Help people block incoming spamming calls.
Functionalities supported:
* block unknown number calls
* bypass calls from contacts
* block calls by region codes
* block calls by blacklist ( wildcard number supported )
* block calls by keywords
* it's all free and **open sourced** !!

Source code available on Github

==== PLEASE NOTE ====
This tweak is originally designed for people in China mainland, and it might not be that helpful for other countries.

Configure options from Settings.


* 增加应对中国移动“和多号”的功能 / ignore phone prefix before matching
* 一些bug修正 / bugs fix
Updated August 15, 2018
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