Good day, tr0n. My name is Jessica_ST and I'll be addressing your question. If your phone run out of minutes while on Auto Refill plan, you will not be able to use the phone since your plan will not kick in earlier to recharge your minutes. However, you may purchase new minutes for your phone and the renewal date for your Auto Refill plan will be changed 30 days from the time you've added your new minutes to the phone. We hope this helps. Please let us know. Thank you.