I believe u have to buy a minimum of RM 150 in any combined receipts from lowyat n then u will be entitled to participate in the "Dip" buy. ( basically u pull out a offer from a "treasure box" n u'll be entitled to buy the item which is stated at a discounted price). Do bear in mind that they have separated into different "treasure boxes", RM150-1,499 get to try box C ,RM1,500-2,499 get to try box B, RM2,500 above get to try box A and etc. Most probably the N4 is in box B or box A.