Vodafone has settled a case with the Commerce Commission and paid out almost $270,000 to 11,000 customers who signed up to a mobile broadband promotion.
The case concerned Vodafone's "Broadband Lite" service, which let customers use the internet on their mobile phone.
Between July 2009 and September 2011 Vodafone offered this service free for three months to some customers and 146,000 people signed up to it.
Once this free period expired, the service cost $10 a month and Vodafone's terms and conditions said customers would be sent a text message to reminding them of the need to opt-out of the service if they did not wish to be charged.
After investigating complaints, the commission decided some customers were not properly advised of the terms of the deal.