Zoom 3G Wireless-N Desktop Router?

Im currently using a Zoom 3G Wireless-N Router with a MF112 Mobile Broadband Dongle on the 3 Network.[URL] ive been using this setup for over a year now and have had no issues. I have 3 appliances that are sharing the wireless internet connection.Iphone - Xbox360 and a Windows 7 Netbook Yesterday i found that i couldn't establish an internet connection, i had connection to the zoom 3g router but no internet access. To my great delight my iphone also refuses to right me internet access. A connection to the router is obtained but just no internet. My partners Xbox 360 though has no problem accessing Xbox Live i just dont get it. Also whilst a connection is established to the router over my Acer aspire one Nbook. my small Gmail/Gtalk icon in the system tray suggests that im online and available. and can interact with contacts. While this confuses me i fire up either Chrome or Fox and wait for my google.co.uk search homepage to appear in which it doesnt. if i load up a Bookmark like say Filehippo. it loads but the webpage is missing icons and its graphical interface.

I tried resetting the routers settings. rebooting my Iphone and Nbook.... Turning off the Xbox360 and then trying to see if i can obtain internet access. Nothing i try seems to solve this annoying issue. its driving me mad. i havent installed / updated or accidental removed anything that could have caused this. Ive had a situation in the past where a router connection is present but no internet access resulting in some sort of DNS issue i think. But when the iphone doesnt establish internet access but the XBOX 360 will. thats just a pain in the a$$.im suspecting that the router is at fault. there must be something that it isnt supplying the Nbook and Iphone with but is the 360. I dont know.