14 DAY TRIAL // In the iCloud Terms and Conditions revised on September 16, 2015, Apple added a new clause named "Two-Factor Authentication and Autodialed Calls/Texts," which, as its name suggests, describes in which conditions the Cupertino tech giant can make autodialed calls or send texts to iCloud users who have two-factor authentication on their Apple ID.
According to Apple, "If you choose to enable Two-Factor Authentication for your Apple ID, you consent to (a) provide Apple at least one telephone number; and (b) receive autodialed or prerecorded calls and text messages from Apple at any of the telephone numbers provided."
Even though this might seem the beginning of an unwanted friendship via a telephone line with Apple, the iCloud Terms and Conditions go on to say that users will only get a call or a message when they sign in using the two-factor authentication feature or when they need help to access their account if they've forgotten their password.
This describes the standard way a two-factor authentication service works, so there shouldn't be any privacy concerns.
Besides providing the standard two-factor authentication service, your phone number will also be used by Apple for other purposes
However, Apple also reserves the right to give their iCloud users a call or a text when they have to enforce their policies, the iCloud agreement or, if the case, any other agreement the user might have agreed to uphold when activating an Apple service or product in the past.
Moreover, users who have agreed to the iCloud's new terms and conditions should also know that Apple might also get in touch via text or phone call for enforcing any applicable laws (you decide what this means).
If not for the part that mentions the policy enforcement, the newly added "Two-Factor Authentication and Autodialed Calls/Texts" in the iCloud Terms and Conditions would match word for word the terms and conditions other tech companies using two-factor authentication have set up for their users.
However, by reserving the right to call the users on the phone number that was supposed to be associated with the Apple ID only for sign in and authentication reasons, Apple makes us wonder about what exactly they're going to use those phone numbers for.