getting too many spam calls

Settings > Phone > Silence Unknown Callers > ON

The phone doesn't ring if the caller is not in your contacts.  The caller can leave a voicemail, but in my experience, spammers don't bother.  If someone bothers you, block them.  (Información   in a circle > scroll to the bottom)

Turn it off temporarily if you are expecting a call from someone whose number you don't know.  Tell people you have this feature turned on so they should leave a message or send a text.  Add them to your contacts then if you do want them to be able to get through.