Trying to get a straight answer to a simple question - over the past 6 months I've gotten into the habit of using the internal call blocking feature on my iPhone 8 to block calls from spammers. When I get a spam call I go to the "Recent Calls" feature and I assign a "block caller" to the number and it adds the caller number to the blocked call list on the iPhone. I now have a VERY long list of blocked spam callers, probably well over 100. However, at the same time, I'm getting frequent notices that my voice mailbox is full even though I am only storing about 8-10 relatively brief voice mails (less than 30 secs each). NOTE, the spam callers do not leave voice mails, so it's not spam voicemail. My voicemail box used to hold far more voicemails than it does now.
So here's the question - does the internal call blocking feature on an iPhone take up storage that would otherwise be used for voicemail even when the blocked caller does not leave a voice mail?
I am not talking about Verizon's separate Caller Name ID feature (which I plan to sign up for but have not done so yet). I'm trying to understand why my iPhone voicemail seems to fill up very quickly now with far fewer messages than it used to, and the only thing I can think of is that somehow the internal iPhone call blocking feature must "steal" storage from the voicemail to hold the large number of phone numbers I have tagged as blocked. I was under the impression that my voicemail box is carrier controlled, not internal storage on the iPhone but now I'm not so sure.
I've searched on this site and on the Apple support site and I am finding conflicting answers. Does anyone know the "correct" answer?
Thanks,
RV