My landline lets me do 2 things.
1. On their web page I can enter numbers to block. (that is, my landline carrier.)
2. My landline company offers NOMOROBO and I use that too.
But there are other devices. Here's one for example.
https://www.amazon.com/CPR-Call-Blocker-Telemarketer-Solicitor/dp/B00JG02ZEY/
I can purchase new phone sets but they limit call blocking to 20 to 30 callers; is there an electronic device that will block all unwanted calls such as solicitors or 'number or caller info not available?? I am talking about a land line not a cell phone.

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