Vivo y15s is a high based 3G mobile, and its network is good in any place, we can use sim1 and sim2 both as 3G. And its costumer service is in all places, and now it is a developing company VIVO.Its camera is 5mp but the camera quality is awesome. And I have purchased that mobile 3 years back, at that time the cost was 8000, and it i. Good working till now without any hang.And it has a resale value.