Note that if you prepay $30 or more, you'll get a 1% bonus for every $3 prepaid (up to a maximum of 50% if you prepay $150 or more). This reduces your cost to between $0.00 and $0.00 per week, in effect (a discount of 9-33%). With the maximum bonus, a cost as low as $0.00 per month would be possible for this level of usage).