Ever since I switched from ATT to Sprint I have see a noticeable drop in spam calls. Is it at all possible that the drop is due to the switch or is this just a happy coincidence?
My protection is the same as it's been since 1995, only the technology has changed.Sad that there's no real protection from this.
The iOS app AT&T Call Protect has greatly helped me stop the spam calls. The most egregious and dangerous callers are blocked by AT&T before ringing.
I bought a silent ringtone and set it as default. Each contact entry gets a real ringtone.