ios device phone number policy

Question

I've spent the last few hours determining that I am not able to retrieve the phone number from the iOS device.

1. Where in the policy does it disapprove retrieving the device phone number? (my interpretation of the policy is that its ok to use the phone number as long as its used as part of your service and you have the users consent)
2. Are their methods to automatically pull the device phone number? (I found 2 deprecated methods but nothing for > iOS 6)

Answer 1

1. There is no policy disapproving retrieving the phone number because there is no way to get the phone number directly.
2. There is no way to get it without asking the user for it.

There is no valid reason to ask a user for their phone number. Why do you think you need it? No app should require a phone number to function.