Last year I downloaded a payment app (Alipay) which required me to sign up. My phone number was pre-filled in the registration screen. Clearly iOS was providin

Last year I downloaded a payment app (Alipay) which required me to sign up. My phone number was pre-filled in the registration screen. Clearly iOS was providing the app with some API to query my current phone number, and was disclosing it without my explicit consent.