How can I get Wireless N 5MHZ Capabilities Dual Band up to 300MHZ on my DV7 Laptop?

Question

How can I get Wireless N 5MHZ Capabilities Dual Band up to 300MHZ on my DV7 Laptop?
Question for 4/18 experts ...
Or specifically, how can I replace my wireless card on a DV7-6B32US and upgrade to Intel Centrino 6230?
I have a relatively new DV7-6B32US puchased on 11/2011.  Still under warranty. purchased 2 of the laptops. (also own 3 hp desktops and 1 HP All in One)
Existing card is wireless N but does not support 5GHZ or dual band.  It is Broadcom 4313 wifi card and I am just realizing that the Broadcom card does not do the dual band  5GHZ wireless N.   I have Linksys e4200 router which supports 5GHZ and dual band speeds up to 300 Mbps.
I called tech support and with their help identified Intel Centrino 6230 as the correct upgrade, and with their help ordered 631956-001.  In the Maintenance Manual for DV7 laptop, this part number was listed for Intel Centrino 6230.  Turns out HP sends an Intel Wireless N 1030 card, which is no better than my existing card.   I called HP and they acknowledged that some manuals use part number 631956-001 for Centrino 6230 and some use 631956-001 for INtel 1030.  So HP support said they would give refund but case manager was of no help in solving the upgrade problem.  Said it was unavailable but here is your money back.
So after more searching, I see others have used part number 636672-001 to order Intel Centrino 6230, specifically for HP ProBook 4530s, 4230s, 4730s.   And if I use part number 636672-001 and go thru parts store at HP, I can purchase it. 
But will it work??
First, will the Intel Centrino 6230 with part number 636672-001 from HP parts,  work in my HP DV7-6B32US, even though the part number is NOT listed in the Maintenance and Service Guide for my specific  laptop.  I see postings about whitelists and changing bios, etc, and am hoping someone can provide some guidance.   I have been thru 2 tech support calls and one case manager and have gotten 3 different feedback from HP, from yes it will work and ordering the part, to buy it on amazon, to it will not work and here is your money back.
Second, I see some postings about Centrino 6230 and multiple antenna's.  When I replaced the Broadcom 4313 with the Intel 1030 card, I simply unattached 2 wires and reattached the wires.  And it worked.   I am wondering if the reason HP doesn't list the 6230 card for DV7 is that DV7 does not have the antennas required to support 6230.   Does the Centrino 6230 require 3 antennas?
Thanks for any suggestions.  The existing cards do work but I paid extra for the Linksys e4200 Router and just assumed a winter 2011 $700 laptop from HP would use the latest wireless n technology, otherwise I would just keep existing cards. 

Answer 1

I have went thru the exact same problems trying to upgrade the wireless card in my DV7.  It is very frustrating that the wireless card can't be upgrade to one that supports 5Ghz.  Here is my post from the network forum. http://h30434.www3.hp.com/t5/Wireless-Internet-Home/Unsupported-Wireless-LAN-6230/td-p/1419595 Doesn't sound like it is possible to upgrade to the Centrino 6230 without it being added the the "white list".  Sound like HP doesn't update the list after shipping the notebook. I feel your pain. HP needs to help out the consumer in upgrading the wireless cards.  I see we are not the only ones that have had this problem.