In a letter to the Federal Communications Commission, AT&T claimed that Sprint and T-Mobile are not abiding by disability regulations.
The fight over using smartphones to make Wi-Fi-enabled telephone calls just entered the unexpected area of disability rights. AT&T has accused rival carriers T-Mobile and Sprint of violating rules set by the Federal Communications Commission (FCC), which require wireless services to accommodate users with speech and hearing disabilities. Unlike AT&T, both T-Mobile and Sprint allow users to make calls on iPhones over Wi-Fi.
