Bought the cell c speed stick 2 weeks ago. Worked okay for a couple of days but then started getting the response "Server not found" for all webpages when I use it at home in Brooklyn, Pretoria. The network shows up as HSPA with 5 bars and I'm supposedly in an area with excellent coverage. No problems when I used it on the same laptop in a different area. The guys at the call centre have been useless. Any ideas?