Android wont connect to internet.

[AC Question]

Modem: dlink 2520U_Z2

Modem *** wifi Router: UTStarcom WA3002G1

OS: Windows 8.1

Mobile OS: Nokia S60 and Android 5.1.1 and 6.

Setting: Connect to internet using Dlink as Modem and Utstarcom as wifi router.

ISP 1 (old)

IPS 2 (current)

Windows 8.1 laptop, Nokia S40 and 60 works fine, but Android 5.1.1 connects but never able to access internet. If I create a hotspot in laptop and connect with my android phone, it works fine.

PS: I use dlink and utstarcom because if I use only urstarcom I am unable to connect to sites like Yahoo and Tumblr.