My daughter's phone took a water bath. We need to get her new phone and we also want to upgrade her plan. There is an outstanding amount of about $105 on her tab. What is the process to do this? We also need to update her plan to more data availability. Do I just pay off her current tab and then shop for a new phone and put it on new tab or is there a different process to follow? Her phone is currently on my plan and we need it to stay that way.