Looks like Digi giving free Internet when you reload. Only for Digi Smart Prepaid and New Best v1 customers.
Reload Amount
(Single Denomination) FREE Internet FREE IDD Credit Freebies validity Dial to redeem
RM10 300MB RM3 10 days *888*1#
RM20 600MB RM6 20 days *888*1#
RM30 1.2GB RM12 30 days *888*1#
RM50 1.2GB RM12 50 days *888*1#
RM100 1.2GB RM12 120 days *888*1#
http://new.digi.com.my/ecomm_C/services/default/reloadgrant