Apple has confirmed some problems with call-directory extensions that make use of CallKit in iOS 10, and expects to release an update with iOS corrective 10.1.

Several apps that exploit CallKit to make the call-directory in iOS 10 are having problems with this feature, as noted by several developers. Apple has confirmed the problem and reassured developers DERL release of an imminent correction: the bug will probably be solved with IOS 10.1.

CallKit allows developers to take advantage of iOS 10 “phone” framework, as happened for example with the Skype app that allows you to handle calls from the lockscreen Also, as a regular phone call.