But here's the rub. Folk that want to fix this without changes to the router settings are left to wait till they change their mind. Your post is typical of network problems but I can't see what the router settings are so I can't comment further.
I have a rock-solid network utilizing a Netgear WNDR4500 router. Every device works fine, including smartphones, tablets, notebooks, an XBOX 360, and a Barnes & Noble Nook 3G.