My new plan works from Mar.18. I refilled account at Apr.4 because I talked too much last month. Now, I can't call again.....It's just Apr.17 . I paid three times in a month ! It's unbelievable.... If I started over from Apr.4 , it should be able to use till May 4. The plan should be called " If you run the times out that you should pay double'' not monthly plan.