Gary:
While I was making a decision on what pay-as-you-go carrier to select, I looked at the Straight Talk and Net 10 phones. Straight Talk has a plan for 1000 minutes for 35.00 with a refurbished phone. You can get this plan from the Internet.
Net 10 has a 40.00 LG flip phone and 600 minutes for just that...40 bucks (plus tax). They add 300 minutes to your phone when it's first activated, and that's for 2 months. The other 300 minutes can be added to your phone when you use up the other 300, or at the end of the first two month. So, depending on how often you use your phone, you can get 600 minutes for 4 months..and yes, the are rollover minutes.
I opted for the Net 10 because of finances right now.