I haven't noticed that I get more spam if I use my phone for calls.
My spam burden is fairly low right now, but I do notice an increase in spam phishers if I activate a phone or transfer service (number) from one phone to another.
Because I don't answer phishing attempts, only numbers on my contact list, if the calls are ignored it usually reduces the number of spammers.
I read somewhere that if someone activates a phone number, that fact or list of new activations becomes available to people who like to phish. I don't know where or how that might be the case but I did read it somewhere a long time ago. I don't see how anyone would know if you've made a telephone call.
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