About keeping number active
I need to leave about three months. My plan is expired at 9,June. I know that one of solutions is refill certain amount of money by PIN and change plan into minute plan. However, I am oversea now. I cannot buy a refill card. My account balance is $0. So is there any way for me to keep this phone number in three months? Or is it fine to just change plan into minute plan helping me to keep number active?