In order to keep the number for long-term use with Yallo, I ask customer support for double-checking with the maintainance. Firstly, he/she told me if there is inactivity of 3-months period that would lead the number to terminated. After then he/she changed it to need their expert for further assistance with it when I send a official policy about the prepaid description, Finally, he/she pointed that 3-months period means the reminder will be sent to you. Once you perform any qurlifying action in 12-montth period that would extend the validity.
客服最初说3个月没有使用号码即会失效(3 month of inactivity leads number to be terminated
我提供他们的条款表示疑问,对方表示需联系专家二次确认(He accurated his indication before, instead of seeking further assistance to their expert
最终确认只需要12个月以内使用过号码即可延长号码使用时间。(Finally, the turth is performing action within 12 months that can extend the validity.