Telecom company T-Mobile said it'll offer free Wi-Fi calling and texting to every customer.

Under this "Un-carrier" initiative, all new smartphones sold by T-Mobile will be Wi-Fi-enabled for Wi-Fi calling and texting. This feature, however, must be built-in by manufacturers.

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All of the carrier's existing customers can now trade in their existing phone for one of the new Wi-Fi-enabled handsets using the company's Jump program.

Wi-Fi calling allows subscriber connected to nearby Wi-Fi networks to bypass distant cell towers and receive texts and calls automatically through the Internet.

The feature improves the call's voice quality, especially when the cell connection isn't that great. The technology could prove useful in buildings that have poor cell signals but have excellent Wi-Fi connections.

If the user is disconnected from the Wi-Fi network, the call should seamlessly transition to the cellular network.

T-Mobile also announced a partnership with Gogo Inflight Internet to let its subscribers send and receive text messages over the Internet on airlines that have Gogo-enabled flights for no added payments.

Over the past few years, T-Mobile has made numerous announcements about what it calls its "UnCarrier " series.

Each of the company's announcements tries to address issues that CEO John Legere sees as problems with the wireless carrier industry. These problems include high costs of international data usage and early contract termination fees.

T-Mobile has been successful in its crusade, winning millions of new subscribers over the past year, according to Geek Wire.

In the first UnCarrier, the company eliminated the established two-year wireless contract scheme and announced that it would finally sell iPhones.

In the second edition of the announcements, T-Mobile allowed its subscribers to upgrade their devices twice in one year.  In the third, T-Mobile dropped roaming fees paid by subscribers outside the U.S.

In UnCarrier 4.0, the company offered to pay its subscribers' early-termination payments.  In UnCarrier 5.0 and 6.0, T-Mobile provided its subscribers with unlimited music streaming and offered them a week of "test-drives" on the iPhone 5S earlier in June.

TagsT-Mobile, telecommunications, iPhone, iPhone 5S, Wi-fi, Wi-Fi Calling, Gogo Inflight Internet, UnCarrier