The FCC today approved a waiver requested by AT&T that will allow it to launch WiFi calling. The waiver gives AT&T permission to deploy Real-Time Text (RTT) as an alternative to TTY technology, which is relied upon by the hard-of-hearing. AT&T requested the waiver earlier this year. TTY is unreliable when used over WiFi and AT&T required a rule change from the FCC before it could move forward with the substitute. AT&T said it was pleased to receive the waiver, though it is puzzled why the FCC isn't taking action against Sprint and T-Mobile, which both launched WiFi calling services without a waiver. "We're grateful the FCC has granted AT&T's waiver request so we can begin providing WiFi calling. At the same time we are left scratching our heads as to why the FCC still seems intent on excusing the behavior of T-Mobile and Sprint, who have been offering these services without a waiver for quite some time. Instead of initiating enforcement action against them, or at least opening an investigation, the agency has effectively invited them to now apply for similar waivers and implied that their prior flaunting of FCC rules will be ignored." AT&T did not say how quickly it will get WiFi calling up and running.


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