Re: Sharing Unlimited Data Between 2 iPhone's
12-30-2012 06:21:28 AM
Changing phones does not cause someone to lose the grandfathered unlimited data plan.
However, you cannot share your mother's data plan. Each phone has its own data plan unless you're on a family share plan, in which case she WOULD lose unlimited data.
Other than an employee or student discount, there is no lower cost option than what you already listed. And you'll need to be very careful not to go over on your data or you'll be paying a lot more than $30/month.