Celcom ady come out new postpaid plan few mths ago where once reach quota they wil cut off straight away. if u wan data just subscribe another 1gb or more at additional cost. so i think Digi is doing this way too... but for Celcom user, this new plan only applicable to new user who sign up few mths back when they launch this new plan, for those sign up before the change still get data after quota with throttle only.