With the iOS 10.1, will be correct some of the problems of CallKit
Apple has confirmed some problems with the extensions to call-the directory who make use of CallKit in iOS 10, and expects to release the update, the correction with the iOS 10.1.
A lot of apps that take advantage of CallKit to make the call-directory on iOS, all 10 are having problems with this function, as noted by several developers. Apple has confirmed the problem and has reassured developers of the release of an upcoming correction: the bug will likely be fixed with the iOS 10.1.
CallKit allows developers to exploit the framework, “phone” iOS 10, as occurred for example with the Skype app, which allows you to manage calls from the lockscreen, just like a normal phone call.
Link to the original article: With the iOS 10.1, will be correct some of the problems of CallKit