T-Mobile To Pay $40 Million Over False Ring Tones on Rural US Calls (reuters.com)
David Shepardson, writing for Reuters: T-Mobile USA agreed on Monday to pay $40 million to resolve a government investigation that found it failed to correct problems with delivering calls in rural areas and inserted false ring tones in hundreds of millions of calls, the Federal Communications Commission said. T-Mobile, a unit of Deutsche Telekom, agreed to changes and acknowledged that it had injected false ring tones into hundreds of millions of long-distance rural calls, the FCC said, in violation of FCC rules.
False ring tones "cause callers to believe that the phone is ringing at the called party's premises when it is not," the FCC said, noting uncompleted calls "cause rural businesses to lose revenue, impede medical professionals from reaching patients in rural areas, cut families off from their relatives, and create the potential for dangerous delays in public safety communications."
False ring tones "cause callers to believe that the phone is ringing at the called party's premises when it is not," the FCC said, noting uncompleted calls "cause rural businesses to lose revenue, impede medical professionals from reaching patients in rural areas, cut families off from their relatives, and create the potential for dangerous delays in public safety communications."
Because you're fraudulently leading the person to believe that there's no problem with the T-mobile customer's signal/reception and that they are just not answering.