Hi, I'm currently using prepaid plan. And I want to change my plan to monthly. However, I still have booster for data like more than 1GB although my prepaid plan ends this month. I do not think I can use up 1GB for only a month. Is it possible to keep my booster for data in my prepaid account even though I do not keep my prepaid plan? So then, when I come back to prepaid plan in the future, can I still use that booster?