Adding a LIne on a Grandfathered Unlimited Data Plan
I am on the iphone 5s and on a grandfathered unlimited data plan. If I want to add a line to my account, how much will it cost? Is this even possible? The only options I see are mobile share value plans, but none of those are unlimited data. I am planning to upgrade my 5s to the new 6s and want to keep unlimited data, and give my mom my old 5s and add a line for her. I want to know how much will i pay for her phone service, and what will her monthly data costs be?