This sounds like the same problem I'm having with my mobile broadband but I am on Vodafone. Sometimes it won't load the page up and I have to disconnect/reconnect a few times before it will and then once it is connected it is hit and miss as sometimes it will close down the internet. It's a right pain in the bum!! I spoke to Vodafone and they said to take usb stick out take sim card out and put back in again and try again and it worked when I was on the phone but it doesn't always work now. My laptop is also very low on memory so perhaps this is the problem?