Even with ad blockers disabled, I only see CPNI settings (which I'd already set to "Don't Share") at https://wbillpay.verizonwireless.com/vzw/accountholder/profi...

http://uidh.crud.net/ also says "did not receive X-UIDH header."

California, Verizon Wireless, Business Account, not on contract.

EDIT: Now an hour later, the headers DO appear. No setting to disable on the VZW site though.