Screen unknown callers. Any call that comes from a number that is not in your contacts will just be sent to voicemail or blocked entirely.
What makes this so much more frustrating is that I work in the telephony industry, and I know the hoops brands have to jump through to make calls or send SMS/MMS. I work with TCR for brand/campaign registration, I work with NetNumber and STIR/SHAKEN cert issuance for attestation levels. All of these hurdles for us, and it seemingly makes no impact in the real world for spam filtration.
never had this issue on my personal android device, just my work iphone.