I am using Firmware 1.21 (no securespot) for my A3. I've never had any problems at all with these configurations. I highly recommend them

Good luck!
Setup --> Wireless Network Settings
802.11n and 802.802.11g
Enable Auto Channel Scan : checked
Transmission Rate : Best (automatic)
Channel Width : Auto 20/40 MHz
Visibility Status : Visible
WPA Mode : WPA2 Only
Cipher Type : AES
Setup --> Network Settings
Enable DNS Relay: unchecked
I get constant good speeds..no problems w. xbox live...no router freezing and the router has not restarted in months. Cheers!
