Not connect Wi Fi .

I have purchased Micromax Canvas Nitro A210. Since the unboxing, I am facing wifi issue. For the first time after first switch on I was able to connect to wifi, but to my surprise after sometime i can't access internet though wifi is connected. I have no problem with wifi network as my another Samsung phone and laptop has no connection or access problem. Then i tried to connect the wifi after doing "forget password", but after I retype the password it shows "connecting", and sometimes "obtaining IP addresses", but never actually getting connected. For all I have to do for connection is to reboot the phone.

Please help resolve this issue. I have heard the customer support is really bad for Micromax.