If found in an emergency and in need of immediate Internet access and the only tool available is your mobile phone with no WiFi access and no unlimited data transfer plan (which can get really expensive depending on your provider, and it is in my case) is there a way you can get online with no costs? How long would it work if there is a way? Also, I often find myself with no WiFi hotspots nearby and my laptop has no Internet access point that way. With Bluetooth built in, I can use my mobile phone (Sony Ericsson W810i) as a modem. Thanks!