Ok ... Got my modem from idm like 7 months ago, it's a cable modem, and since i got it i've been experiencing some prob.

At start, I installed it and I had a router from my other house so did not need to buy the router modem which i wish I had ... because, after abt 4 hours of improvising and customer help isn't that much of a help, i made it work ... but everytime i need to use the internet on my pc, i need to use an Ip adress and Dns that i randomly picked to make it work ... It's ok, good thing it's working.

got myself a new cell, with wireless ofc, E71 to be specific... the problem is, sometimes it connects alone and everything's working, and some other times, i get this mind numbing message : ''No Gateway Reply''
what to do ? i know this alot to prosper, but please help some tips would be enough i kinda know my way around the stuff ( I repeat, kinda ... )

thank you .
7 days later
please anyone? :S the connection on my cell is working everywhere but home :S can you point me to how to configure my router (tp link ) correctly? please