This is somewhat unrelated... but not entirely, so here goes:
I recently got a Verizon 5G home internet router.
I live in a shit tier motel posing as an apartment building, doesn't actually have wifi or cable despite advertising it. Hooray for living off of SSDI.
Anyway, a few weeks after setting it up, I go into the App to check my bill amount and date, make sure they're tied to my correct account.
... In my account activity history is a complete pdf receipt for the previous owner of the phone number that my 'gateway' is now using.
I've got their order number, full name, address, the exact model of phone they bought along with case and screen protector and charger, the imei, the last 4 digits of the card they paid with, and their signature.
Verizon just fucking did not care enough to wipe this receipt out of the account history after ... presumably this person stopped paying, cancelled their service, fucking died, who knows.
So now its part of my account history after Verizon reassigned their old phone number to my 5g gateway.
... And I just checked again, yep, two weeks later, its still there.
Behold, your personal data is safe with Verizon, you're in good hands.