Sadly I use my cell phone for work and have a 7 state region. I get all kinds of weird numbers calling me that are legit work stuff. On the robo calls I usually just answer and lay the phone down until they finally hang up. Other times I'll push 1 for a live person and then string them along for fun. But I sooooo wish there was a free option to stop them. I use to register every number that called me on the national do not call registry web site but I don't think that worked...