They made five futile attempts to ring my phone. Must be affiliated with Unavailable 650-267-7183. CleanPlanetPro would call first then immediately after, Unavailable 650-267-7183 would call.They made these alternating calls, 10 calls total within one minute time before giving up. The call screen feature At&T U-verse Voice provides works great. They get an immediate disconnect and my phone doesn't even ring.