I get almost no legit calls to my cell phone (no land line). So I get percentage-wise a very high number of spam calls. My solution is too add the number to my contact list and mark that contact as silent ring. There's 33 numbers spread across 4 "scam" contacts (a contact can only have 10 numbers). Some of those numbers have called up to 10 times.

Where as if I check my "recent" call list there's been no more than 2 legit calls a month