Need a top quality caller ID/spam blocker for iPhone
 

Any suggestions. I belong to at least two programs and calls ring through as “potential spam” and I get a lot of calls with no ID. I know not all callers have an ID, but I’d like to send all suspicious and unidentified calls to voicemail directly.

I use youmail.com Works OK for my needs - not only can you block calls, you can filter those annoying same area code and prefix deals and send some messages to straight busy signal.

Seems to work, I'm not getting so many stupid calls anymore.