I am trying to use private APIs to achieve this.
These are the classes I know that can help, but responses to existing questions such as these don't work -
Disconnect or connect an iPhone call programmatically
Some of the classes have changed since MobileSubstrate crashes on iOS 10 when I hook SPPluginManager or Incomingcall.servicebundle.
Please point me to the right class/function hook for Theos development.