Compatible with iOS 11.
Help people block incoming spamming calls.
* 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.