Hi, donít use a mobile phone for broadband then! Use a land line for much cheaper Broadband connection.
By the time you pay landline rental, it works more expensive the mobile BB,
specially if you not at market 3 exchange.
First step is to find out which mobile provider has a good G3 signal in your house / area.
(Without that Mobile BB is just unusable).
Then look at what they offer. Unfortunately PAYG deals expire whether you use them or not,
so more then likely you will need Pay Monthly deal.