Some of us may forget it from time to time, but smartphones are still phones — as in, they can make and receive phone calls. We've got apps, messaging, and the whole of the internet open to our fingertips from that compact glass rectangle in our pockets, but even the dumbest smartphone can do old-school voice-based telephone calls. So fire up that dialer or phone app and check your call log: When was the last time you used your smartphone for an actual phone call?

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