Verizon has become the latest carrier to be provided an FCC waiver, allowing it to offer subscribers Wi-Fi calling. Following after AT&T, Verizon received its waiver after petitioning the FCC, asking for permission to use Real-Time-Text (RTT) as an alternative to the required Teletypewriter (TTY) system used to allow people with hearing impediments to make calls, a technology apparently ill-suited for IP-based telephony.
