T-Mobile says it’s the first wireless carrier to support the Apple Continuity feature in iOS 9 across a cellular network.

Continuity is the iOS feature that allows calls and messages to be sent to (or originate from) your Mac or iPad.

Continuity has been around for a while — it arrived with iOS 8 — but until now your Apple devices had to be connected on the same Wi-Fi network for it to work.

With the arrival of iOS 9 (now in beta) the devices can be connected on either Wi-Fi or cellular. This means that if you leave your (T-Mobile) iPhone at home you can still make and receive your calls and messages on your Mac at work.

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As with many other features and pricing models, T-Mobile is the first mover on cellular Continuity.

“Of course, when Apple came looking for someone to work with on this killer new feature, T-Mobile was first in line … just as we were with advanced Wi-Fi calling and texting on the iPhone 6 and 6 Plus,” T-Mobile said in a note to VentureBeat.

But by the time iOS 9 becomes generally available later this year, it’s likely that the other major U.S. wireless carriers will support cellular Continuity too.

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