You need to ensure you have enough balance, or it won't work at all. My prepaid balance was zero, and I had nothing in the validity section. When I reloaded RM130, I got 365 days of validity for RM108 in validity section.

It's much more expensive than the RM38 I used to pay, but at least it's something! I'll try to subscribe to any add-on later to see if I can unlock the RM38 for 365 days of validity again.