well...maxis never learn. I have 2 supplementary line for my parent. and they are only using those feature phone and not smartphone. So why the heck i need data for that. So...i guess now, what all we can do is change the supp line to normal line, then port it out to another telco which offer lower fees for supp line. And they won't let you just port out supp line, you need to convert it first.

Maxis.... if you are reading this....please do let us know what other solution you have to remain the low supp line fees