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US: AT&T says T-Mobile and Sprint Wi-Fi calling violates disability rules

By  |  October 4, 2015

AT&T accused on Friday T-Mobile and Sprint of violating federal rules that require wireless networks to be compatible with technology for people with hearing and speech disabilities.

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    AT&T says T-Mobile and Sprint began offering Wi-Fi calling on smartphones without seeking a waiver from the Federal Communications Commission’s TTY rules. TTY devices for deaf and speech-impaired people can be used in conjunction with cell phones, and the FCC requires wireless networks to be able to transmit 911 calls made using TTY devices.

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