Is it possible to hack facetime call? [closed]

FaceTime is quite secure. In Feb 2014, Apple published a white paper on the security used in various iOS services, which finally brought to light some of the features that others had previously inferred or guessed at. The section for FaceTime states:

FaceTime is Apple’s video and audio calling service. Similar to iMessage, FaceTime calls also use the Apple Push Notification Service to establish an initial connection to the user’s registered devices. The audio/video contents of FaceTime calls are protected by end-to-end encryption, so no one but the sender and receiver can access them. Apple cannot decrypt the data.

FaceTime uses Internet Connectivity Establishment (ICE) to establish a peer-to-peer connection between devices. Using Session Initiation Protocol (SIP) messages, the devices verify their identity certificates and establish a shared secret for each session. The nonces supplied by each device are combined to salt keys for each of the media channels, which are streamed via Secure Real Time Protocol (SRTP) using AES-256 encryption.

FaceTime calls are encrypted sufficiently for most anyone's needs. FaceTime's encrypted stream acts underneath any other WiFi encryption that might also be present. If you feel that end-to-end data streams encrypted with unique keys for each recipient is safe, then I'd say have fun with FaceTime.

Someone with special skills, tools and time could probably crack it, but you probably don't have a high enough profile to be worth the time/effort.