Yup. I just walked in to U Mobile store to ask. Was told one month too.

Question is, do I need to keep the line active when doing MNP? I have used the U prepaid for 7 days and I don't think I want to top up to keep the line active due to the poor 4G coverage at the areas I frequent.

Thank you for the reply. I might just let it go inactive for two weeks, then pay RM10 to re-activate it for MNP purpose.

I want to switch from digi prepaid to hotlink. As I still have about RM70 in digi prepaid account, I will need to convert from digi prepaid to digi postpaid, and then port to Hotlink.
Questions:
1. Is there any cooling period after I convert my digi prepaid to digi postpaid before I can port to Hotlink? Different shops tell me different stories.

2. Am I allowed to MNP from digi postpaid to Hotlink? No need to be digi prepaid to MNP to Hotlink right?

Thank you for the suggestion on converting to best 2016 and selling/giving away the credit.

RM70 may be kacang putih to you, but it is a lot of money for me to simply throw away.

No offence taken, bro. It is indeed a hassle to convert to postpaid and I don't know if there is any cooling period - which defeats the purpose as the cheapest postpaid Digi plan is no longer RM28.
No wonder I could not see credit transfer option in this account, as it is a Digi Smart plan. I have another Digi prepaid line, so the credit can be transferred to this account.
Meanwhile, I just realised I can extend the validity of this line one day at a time at RM1 to slowly finish the credit off.