still at their website

http://www.lowyat.net/2016/102794/digi-unv...nt-through-app/

is it true that now sup line for oni rm10 ? can share the data from main line ?

However, there is one catch though: the principle line holders not able to carry forward their leftovers data to the following month once they activated the Internet Sharing feature. Supplementary lines still able to carry forward their data though but within the limits of their own account, not from the additional data supplied by principal line holders through the Internet Sharing feature.

You'll need to have at least 1 active internet plan subcription before you can purchase Internet Topup.

-Try buy RM3 weekly internet and you'll see the Internet Topup option activated.