Going to add my husband to my At&t cell plan?

I'm going to be adding my husband to my AT&T iPhone plan so there will be 2 lines. When he joins with mine does he have to pay full price for a new phone or does he get a discount?

If you are adding another new line to your AT&T account, as a brand new line of service with AT&T, you can get a new phone through a 2-year contract instantly.

If he's already got an account with AT&T separate from you, you can merge accounts, but his contract information will follow his phone and phone number. If that's the case, he'd have to either cancel the line and pay the termination fee, or, choose the new AT&T Next / monthly payment option to get an upgrade (if available to you), or, start a new line of service.