T-Mobile Debuts VoLTE in Seattle
T-Mobile today announced that it has launched VoLTE service in its home market of Seattle. T-Mobile claims that VoLTE service offers both voice and data in the same radio layer and offers call set-up times that are twice as quick. T-Mobile's VoLTE service includes HD Voice, though T-Mobile has offered HD Voice separately since last year. In order for HD Voice to work, both handsets need to be HD Voice-capable. According to T-Mobile, its VoLTE service uses Enhanced Single Radio Voice Call Continuity (eSRVCC) to make sure calls don't drop when leaving LTE coverage regions. This is an LTE Advanced feature that assures seamless voice service no matter the technology used to connect the call. VoLTE will first be available to the LG G Flex, Samsung Galaxy Note 3, and Galaxy Light handsets. Owners of these devices will need to update the software of their phone in order to make use of VoLTE. T-Mobile said its VoLTE service will expand to new regions and devices over the months ahead. AT&T is launching VoLTE this week, and Verizon plans to launch VoLTE later this year.
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