Motorola :: Atrix 2 4G Not Connecting To Airport Router

I just bought an ATRIX 2 at end of October and have spent days trying to make WIFI connection work.I could get to internet via cellular 3/4 G but although the phone would show the WIFI network and know it was there it wouldn't connect.It would try and then say "Disconnected".Finally, through reading tons of blog entries on different sites, I pieced together a solution I wanted to pass on to others.I have an Airport Extreme router.It was necessary to enter the MAC Address from my phone into Airports setup using Airport Utility. Then I also had to explicitly choose a Radio Mode that did NOT include the "N" option. Most options are hidden (for some bizarre unkown reason) so when clicking on the Radio Mode field in Airport Utility Wireless Section, hold down the "Option" key (at least on MacBook...maybe Control on Windows, but then you prob don't have an Airport router).This brings up a bunch of Radio options not shown by default.Choose one with no "N". Then be sure the Enable Auto IP" is checked "ON" under the Wireless Settings/Advanced section.Once this was done, have full strength connection and blazing fast.