AT&T has resolved the "interoperability issue between carriers" customers were experiencing on Tuesday, the company said in a statement.
In the past 12 months, more than 76,000 complaints about impostors were reported, according to the Federal Trade Commission.
Right now, customers have to take the extra step of requesting tools from their carriers or downloading apps to help them weed out unwanted calls.
Sandra Armas of Fresno can now spend some quiet downtime, catching up on the news or her favorite shows without the annoyance of telemarketing calls on her cell phone at all hours of the day.
At Valley Children's Hospital in Madera County specialists like Dr. Clifton Huang love to bring good news to patients. For more than a year and a half 17-year-old Jacob Duran suffered symptoms from a condition called Crohn's Disease.
The Federal Communications Commission says that robocalls and telemarketers are the top source of complaints received by the agency.