Anyone know anything rings once then hangs up

Not sure who it is that's calling. But they won't quit calling me

Stop calling don't no you

I received a call. I inquired about a rental to own site and this was the call back numb. I am trying to find out more about this caller...checking on whether this organization is legit or a scam. I know it happens all the time so I really need to be careful. If anyone has heard of this company...rent to own... please let me know...good or bad..