When you answer it pops up as a sucker and will keep calling your # for days. If you dont answer will only try couple times before taken off list.

it seemed like I was starting to get fewer of them , hadn't answered a call from anyone who wasn't in my phone book in like a month or more.

have a ringer for callers I don't have in my phone book , the tinkle tinkle soft and light ring that I just ignore unless I am expecting something

then I had a reason I had to answer a call that I wasn't going to know what number it was coming from , it was important , in the 4 days I was answering my phone the number of spam calls went up 5X at least
I was down to less than 1 a day many days and I was almost immediately up to 5 - 7 a day.

if it is important they can leave a message , just make sure you actually have VM set up.

now a week of not answering one I seem to be back to 1-3 a day

Worst is when expecting Dr to call. Cant go by what phones says is calling. once had phone say Dad was calling. Thought was funny because he was taking a shower in other room.

Maybe he wanted you to wash his back?

Not if immediately hang-up
It's how they operate

I never get ANY spam calls EVER, 'course I don't have a phone! LOL