Amazon calculates a product's star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
I received the product the following day after I placed the order. Delivery was always fast. The product was good for its price, but disappointed with the packaging. It doesn't come with a headset. Only the phone and the charger.