I usually use the 60 day 300 minute plan, but my mom bought me a 120 day 600 minute plan. My minutes expire in 6 days. I have 400 minutes left. I am wondering if I use the 120 day 600 minute plan, if my minutes go away from that, because for Net10 some plans make any other minutes in the phone go away, but I'm not sure about this one. Please help me!