for iOS 9.1 software

Handoff
Pick up on one device where you left off on another. You can use
Handoff with Mail, Safari, Pages, Numbers, Keynote, Maps, Messages,
Reminders, Calendar, Contacts, and even some third-party apps. For
Handoff to work, your devices must be signed in to iCloud using the
same Apple ID, and they must be within Bluetooth range of one another
(about 33 feet or 10 meters).
Switch devices. Swipe up from the bottom-left edge of the Lock screen
(where you see the app’s activity icon), or go to the multitasking screen,
then tap the app. On your Mac, open the app you were using on your iOS
device.
Disable Handoff on your devices. Go to Settings > General > Handoff
& Suggested Apps.
Disable Handoff on your Mac. Go to System Preferences > General,
then turn off “Allow Handoff between this Mac and your iCloud
devices.”
Phone calls
Make and receive phone calls on your iPad, iPod touch, or Mac, as long
as your iPhone and other devices are signed in to iCloud and FaceTime
with the same Apple ID and are connected to the same Wi-Fi network.
See .Make and receive calls on your iPad, iPod touch, or Mac