And all you have to do is tell Samsung every phone number that ever dials you or that you ever dial.
Or you could just:
- Set the default ring to silence.
- Add your known contacts.
- Set your contacts in a group with a normal ringtone.
- (Optional) Disable voicemail - sorry, but if I'm not going to answer your call, I'm certainly not paying to hear your spam message.
(Oh, and use the default Samsung "block this caller", etc. features, google unknown numbers if you're worried you're missing something, wait for anything important to actually send you a text rather than try that stupid scheduling-nightmare of actually trying to take to you live, etc.)
Hey, presto, you'll never be bothered by spam calls again. Oh, maybe they'll pop up over your mobile games silently and you'll have to press cancel once in a blue moon.
Also, register your business/personal numbers with the damn TPS in the UK. It cuts out 90+% of unsolicited calls instantly. Not perfect but if spam calls bother you, why have you not done that one simple thing?
Because of abuse of the system for decades, positively encouraged by telcos who want the revenue or to charge you for blocking/caller ID services, I do not have a landline any more. I have a dual-SIM mobile phone, one of which is a throwaway number that does not ring (I bought it purely for unlimited data, so I didn't need the number anyway). I do not answer any call that isn't from a registered contact on my mobile. If one does ring, I Google it at my leisure. If it's someone I deal with, I create a contact and silence/allow that contact as required. (P.S. Spark Energy if you call me one more time in business hours and never follow up outside those hours or try any other way to contact me, I will just move my service to someone else. And no, I don't want a smart meter anyway). If it's an unknown number I ignore it (actually, I never even hear it anyway, but I certainly don't ring it back later either).
And then if something is important, and people's ONLY thought is "well I rang him a couple of times from a random number he doesn't know and he never answered" and at no point do they consider texting me ("Hey, it's John, trying to get hold of you."), emailing me, Whatsapping me or writing me a letter, then it's just not that important. Impact on life with 20+ years of this policy so far? Zero. No horrendous situations unable to be dealt with, no missed doctor's appointments, no local councils trying to desperately warn me of a critical situation with my council tax, nothing.
And the best thing, for me? Business conducted via audio channels isn't legally binding without a recording, and you can't record both sides of the conversation on most modern mobile phones. Hence, nothing of import will ever be done by such side-channels, and you're just going to have to send me an email or write me a letter, at which point it's automatically in writing. "An oral contract not being worth the paper it's printed on" and all that.
Seriously, it's 2020. I should not have to deal with spam. I get absolutely minimal spam in my email, and telephones are a thousand times more disturbing.
P.S. I also used to be self-employed and run my own business. Business numbers are slightly different. That's why you send them to voicemail to email for new contacts, or even a virtual office receptionist setup nowadays, and add your customers to your contacts. It's really not difficult.