[i9001] Unable to connect to WiFi 802.11n

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http://forum.xda-developers.com – I'm using the latest Arco CM9 ROM but I'm totally unable to connect to my 802.11n router. The phone actually identifies & saves the network but it is unable to gain access to internet. Using the 'connect to network' achieves nothing but the phone reports that it the network is 'Saved, secured with WPA2'. Disabling encryption doesn't help either, it still won't connect even if the network is set to open. Other devices are able to connect though. :( (HowTos)