How can I stop these calls they are frustrating.

Does the FCC or FTC do anything about this stuff? Anything at all??  The guys call all the time and today I actually got an Indian guy who said he's from Air Care, an air duct cleaning service.  I googled it and there's an Air-Care Duct Cleaning service in Las Vegas (known scammer haven), but there are other companies with the same name, so who knows.  Maybe several companies use the same Indian call center.  Anyway, after several attempts to inform this guy what he was doing (calling my cell phone) was illegal, he kept on trying to sell me duct cleaning services.  He finally hung up but boy was he persistent.  

If you ever get a call from this number or any telemarketer calling your cell, please inform them that this is, in fact, illegal.  And never, ever, under any circumstances, buy goods or services from direct call telemarketers.  This is the only way it will stop.  Because the government won't do diddly about it.

If you are a telemarketer reading this, do us all a favor and go start your car and suck on your tailpipe

Un-freakin-believable!  I received my second call of the day from this number but representing a different company.  The company is called Indoor Air Solutions.  Evidently, they both work with the same telemarketing company that makes illegal direct telemarketing calls to cellular phones.  This is terribly frustrating!

Report them here:
https://www.ftccomplaintassistant.gov/#&panel1-1
https://esupport.fcc.gov/ccmsforms/form1088.action
https://complaints.donotcall.gov/complaint/complaintcheck.aspx?panel=2
http://www.consumerfinance.gov/complaint/

So, I'm guessing the first called said "Airtek" and not "Air Care", because after googling "indoor air solutions", I discovered Airtek Indoor Air Solutions and Airtek Air Duct Cleaning.  Will keep researching.