I have heard that if you currently have a 20% or so discount for your AT&T service and upgrade to an iPhone you loose this discount. Is this true?
What if you had a family plan with a regular phone as the main line and an iPhone as a secondary line? Could you keep the discount on the main line?
What if you had a family plan with a regular phone as the main line and an iPhone as a secondary line? Could you keep the discount on the main line?