[1][2] Since the release of iOS 15, iPadOS 15, and macOS Monterey, non-Apple systems can be used to participate in FaceTime calls using a web client.

[8] In May 2011, it was found that FaceTime would work seamlessly over 3G on all iPhone, iPad, and iPod Touch models that supported it.

Even though FaceTime worked only over 3G at that time, it now supports 4G LTE calls on networks all over the world, and availability is limited to operators' GSM plans.

[10] The 5th generation iPad Pro, which was introduced in May 2021, features Center Stage, which allows the camera to follow a user when they are on a FaceTime call, and was also expanded to other third party video conferencing applications.

Center Stage is a feature of all iPads released since 2021, and is also available on Macs using the Apple Studio Display or a paired iPhone with an Apple A13 chip or newer using Continuity Camera, a feature that allows Macs to use iPhones as a camera that was introduced in iOS 16 and macOS Ventura.

[11][12][13] On June 7, 2021, during Apple's WWDC Keynote, it was announced that FaceTime would be made available for Android and Windows users via the web.

[14] A new feature called SharePlay was announced for FaceTime on iOS 15, iPadOS 15, and macOS Monterey at the same event.

FaceTime requires a paired iPhone or iPad with iOS 17/iPadOS 17 and supports Center Stage and Split View with an A13 device or newer.

iOS 7 and newer also provide a separate FaceTime app, as there always has been on Apple's non-telephony devices: iPad, iPod Touch, and Mac.

[23] Walkie-Talkie is a limited FaceTime Audio-based communication feature made available on September 17, 2018, for Apple Watch devices running watchOS 5.0 or later.

[24] Walkie-Talkie is intended for short and quick messages between two people rather than long conversations which are better suited for traditional phone or video calls.

Users can set their availability for walkie-talkie through the control panel or in the app itself, which allows friends to start a call at any time.

[25] As of June 2010[update], FaceTime was not enabled on devices bought in the United Arab Emirates possibly due to regulations in this country that restrict IP-based communications.

[32] Apple said in a statement that it would release a fix for the exploit shortly, disabling Group FaceTime for the time being.

On February 7, Apple fixed the FaceTime vulnerabilities in iOS 12.1.4 and a Supplemental Update for macOS Mojave 10.14.3.

He and his mother tried for more than a week to warn Apple about the problem through Facebook and Twitter after discovering the bug on January 20, without receiving answers.