Unable to connect my Blackberry 8820 to Netgear wireless router?

Cause: If your router has a beacon length over 340 bytes (e.g. WNDR3700, WNDR3400), you may experience a problem connecting your Blackberry 8820 (maybe some other models too) to your wireless network.   This is a limitation on the Blackberry device, not the router.
Resolution:
Please choose 1 of 2 work-arounds provided below.
1. If you are using a mix-mode security (WPA-PSK + WPA2-PSK), switch router's wireless security
mode to WPA2-PSK(AES) only.  
     a. Login to your NETGEAR router (see How do I login to my router?).  
     b. Go to Wireless settings menu.  
     c. Change Security option to WPA2-PSK(AES).  
     d. Click 'Apply' button.

2. Disable WMM (WiFi Multimedia) in your router.  
     a. Login to your NETGEAR router.  
     b. Go to QoS setup menu.  
     c. Uncheck 'Enable WMM' option to disable.  
     d. Click 'Apply' button.
     e. Connect your Blackberry to the wireless router.
     f.  Go to QoS setup menu.
     g. Check 'Enable WMM' option to enable WMM feature.     
     h. Click 'Apply'button.
Note:  This solution applies to almost all Netgear Wireless Routers and Modems. Once you have connected your Blackberry device to the wireless router, you can enable WMM or switch back to mix-mode security.