I'm currently on a basic $15 text plan with data and talk booster add-ons. Starting early December I'll be leaving the country for 6 months. If possible I would like to be able to still have my phone number, as well as any minutes/data remaining in the boosters upon my return. The simplest way to do this is keep paying while I'm away, but I don't feel like throwing away $90 for that time, given I won't be using my phone at all. Is there a way to keep these things for free or at a reduced cost?