Sprint introduced Thursday a feature that enables users with its Everything Data plans to make unlimited calls to any cell phone on any U.S. wireless operator.

The Any Mobile, Anytime feature will now be included with the carrier's unlimited data, SMS, and video messaging plans. The lowest plan costs about $70 a month and includes 450 minutes, unlimited data, Sprint TV, and access to things like National Football League Mobile Live. Calls to any cell phones won't deduct from the monthly allotment of minutes, but calling landlines will.

"We don't think our customers want to have to keep track of or only talk to friends, colleagues, or family members who make the same choices they do," said Sprint CEO Dan Hesse in a statement. "Any Mobile, Anytime provides unprecedented simplicity and value, so much that many more customers can now consider cutting the cord altogether."

The move may help the third-largest U.S. carrier cut down on the amount of users who cancel service, which is known as the churn rate. Sprint continues to bleed subscribers, and it was the only major carrier to have a net loss of customers last quarter.

The unlimited calling plan also one-ups its rivals, which also provide some form of free calling. T-Mobile and Verizon Wireless both enable customers to call up to five numbers without using their minutes, and AT&T also introduced a similar calling option this week.

The new calling feature also makes Sprint an attractive carrier for smartphone users because the Everything Data plans represent one of the best values in the industry. The company also has boosted its portfolio of devices, and it will soon be able to offer attractive handsets like the BlackBerry Tour, HTC Hero, and Palm Pixi.

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