Question about blocking phone numbers

[Cscottrun]

If I block someones number, what happens when they call me? Does it ring as it normally would? Or does it go straight to voicemail? Is there anyway for them to tell that I've blocked them?

I don't have another phone with me to try for myself as I am traveling right now.

 

[c55]

nope https://forums.macrumors.com/thread...re-their-imessages-still-retrievable.1650968/