Tips for reception
Get the dongle outside, or as close to outside as possible. I got terrible reception in a house with thick walls. By getting a 5m cable, I put the dongle out of the open window, whilst sitting out my desk, for much better reception and no-freezing.
Plain-an-Gwarry area. Poor reception, slow speeds and constant freezing in a very old house with very thick walls. Fairly good reception and speeds and speed when sitting outside, or with a very long USB cable putting the dongle out of the window. HSDPA and 3G.
Dobbs Lane area. Excellent reception and speed. No freezing. HSDPA and 3G.
Edge network reception throughout. Resonable speeds.