Why won't my Samsung Galaxy connect to my home WiFi?

Sometimes it says connected, but can not browse.  Usually it just says Connection Failed.  I reinstalled my router and made sure it was secure with a password.   Someone suggested a new router. Is that really the answer?  My PC's work with this one.  My husband has the same problem with his IPhone. 
It connects just fine in all the public places and some home WiFi's.
Thanks,

I've had my Gal Tab (7", SCH-I800, v2.3.5) since May and have had the same WiFi no-connect problem. In searching a lot of blogs for others having the same problem, it seems the issue is with, for one, Belkin routers - the Tab will not connect to at least some models of it. I was sad to discover that because, of course, I have a pretty new Belkin at home and am not replacing it.  A workaround was to tether onto my home's WiFi through my Samsung laptop Windows 7 home networking ability. It nicely provided a 'tunnel', if you will, to the internet for my Tab. But, low, after the last firmware upgrade on the table to 2.3.5, I am no longer able to connect via Win7 : ( 
Hopefully, some of that is useful info.

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