I am looking for the TnC that says clearly that the "Truly High Speed" add-ons' internet (20GB/ 40GB) can be tethered. Any pointers?

If true, I will switch over from telco Y for a while to use as my office's internet. Telco Y's 20GB of RM20/ month (promo) tak cukup pakai for 1 month. But jump up to 30GB/ 40GB will increase price so much.

So this Digi Truly High-Speed RM35 - 40GB is sweet.