This bill expands the federal "Do Not Call" rules to protect all telephone subscribers, not just those with residential phone lines, from unwanted robocalls and telemarketing calls. Currently, the rules only apply to residential customers, leaving business phone lines and cell phones potentially unprotected in certain circumstances. The legislation also strengthens enforcement by removing the requirement that consumers receive multiple calls within a 12-month period before they can take legal action, instead allowing them to sue after receiving even a single violating call. The Federal Communications Commission would have 270 days after the bill becomes law to update its regulations to implement these changes. This bill would primarily benefit businesses and cell phone users who currently lack the same legal protections as residential customers.