IMPORTANT UPDATE: APPARENTLY THE SECURITY CERTIFICATE HAS BEEN CHANGED TO Verisign G2 Class 3, SO YOU NEED TO SELECT THIS INSTEAD OF THE ONE ADVISED IN THE TUTORIAL. SEE COMMENTS FOR MORE INFO.
HOPE THAT HELPS, ADMIN.
Something that has always troubled me since my arrival at Imperial is the my inability to get my WLAN loaded Nokia device to connect to the wireless network at the college. The authentication always failed and the search on the ICT website produced no fruitful results. The ICT does provide very detailed instructions for setting it up on the likes of iPhone but nothing for a Symbian device. The thought continued to bother me, more so while studying in the library for the exams and that was perhaps the best possible time to do everything else than study.
One fine day, after getting my new Nokia 5800 XM I spent about 2 hours and finally succeeded in connecting to the network. Here I’m giving all the detailed instructions of doing so, which saves a lot of time and gives more to do sitting in a boring class 
Note that this is a lengthy process, so follow the steps carefully. This works equally well on other WLAN featuring devices such as N95. Obviously, you need to be in the range of the network to get this to wrok 
- In the main menu of the Nokia device, go to Settings >> Connectivity >> Destinations.
- Select Access Point (add new acc. pt.)
- Select Wireless LAN
- From the list of networks, select Imperial-WPA
- Go back, and select Internet from the Destinations menu (the one you get after Step 1). A list of your access points is shown.
- Select Imperial-WPA, click Options and select Edit.
- The next page contains a range of settings most of which will stay as they appear. Check that it has the following options selected.
- Double tap on WLAN security settings and check that the page shows the following.
- Now again double tap EAP plug-in settings, and enable EAP-PEAP while disabling all other EAP options. It should appear like this:
- Select Options for EAP-PEAP, and then Edit.
- The next screen is where you enter your college username (enter your OWN username), and also ensure the settings are the same as shown below. The two screenshots here show the complete settings. Make sure you select the right Authority Certificate (VeriSign Class 3 Public).
- If you just look at the top right corner of your screen, there is a small arrow pointing to the tab of next settings page. Click or tap that arrow (right button on non-touch devices). The next page shows another set of EAPs as shown below. Select (and enable) only EAP-MSCHAPv2 and disable others.
- Go to Options for EAP-MSCHAPv2 and click Edit (or simply double click on EAP-MSCHAPv2). The new page shows the option to enter username (again!) and the password.
- That’s it. All done! Select back as many times to get to the main connectivity screen. Go to Wireless LAN (on Settings >> Connectivity), select Imperial-WPA and hit connect.
Doesn’t take very long really once you know what to do. If you run into any trouble, drop in a comment and I’ll try to help out. I think the ICT guys may like this so I will try to ask them to put it up too.
The next HOWTO in this series of staying well connected will about getting your @imperial.ac.uk mails pushed on the Nokia devices. Obviously, if you’re connected you need to have the e-mails too!
Have fu, and enjoy the mobility!
P.S. I don’t know how to get this through to ICT so if anyone has a direct address of ICT guys, just forward ‘em the link.
Its a little bit complicated to set up for the first time though. I still didn’t find a direct ICT contact. This raelly needs to be on their page as I’m sure many students are looking for it.