I installed latest version of Jumblo. I have Internet with broadband connection. I get issues when I try to login in to Jumblo. When I do it, the Internet stops.
The problem could be caused by the outdated dialer. Try to upgrade the application to latest version. The fact is that Jumblo uses a client that is almost the same on many websites of this kind and since it's in continuous development, updates are deployed all the time. Updating should fix the issues.