Never had this issue before IOS 17, still continuing after 2 more updates. Husband and I have 2 phones, 2 separate numbers, one Apple ID. Each receives just their own phone calls and texts and have done do for years. We share contacts/photos, etc. But now when I call someone, it pops up on their phone as my husband’s name. Tried multiple times to change. If I put my name as the “my card” on contacts on my phone, it changes his phone to read my name and vice-versa. Bottom line, “my card” (and new contact poster, if I did one)on both phones are identical with only one of our names for both, therefore one is incorrect. Each phone mirrors the other, which is what a receiver of a call sees, even though the correct number shows, but name is wrong. Deregistering does not work. Just spent over an hour with an Apple Rep who is up streaming my issue to whoever, as he tried everything to fix without success. So, if you have two phones with same Apple ID, both will show the same name/poster, cannot have separate names. Ugh!