Caller ID said 'NOT IN USE'. I almost laughed. Someone chose that one. So, since it is not in use, I picked up, but said nothing, and was responded to in the same way. After about 20 seconds I just hung up.
I blocked this call today, they left no message. I am absolutely loving this Panasonic, it lets me block calls and since Christmas the calls have substantially dropped! I especially love the automatic private/unknown caller blocking.
Caller ID said they were TRG Polling. Other messages on this site had lots to say about them, nothing good. They said they were calling for a medical study for COPD, when I told them I was on the DNC list they said they were a non-profit, I said that medical clinic's that did studies were non profit and that their call was illegal, she hung up.