I can usually connect to the internet by tethering my LG 990 2.3 to my prepaid Vodaphone.
I just spent 4 days interstate with no problems. I am now in a new location getting a strong Wi-Fi connection from my phone, but the same laptop (XP) is now unable to connect.
Nothing was changed. I even tried connecting to a desktop.
A nice cold beer for the best advice. Cheers.