They covered Vodafone's claims about the size of its mobile phone or 3G mobile phone network between September 2008 and February 2009.
Vodafone's marketing director, Greg Campbell, said the company had taken the charges seriously and apologised to customers.
"We have co-operated fully with the Commerce Commission throughout the investigation of these cases," he said in a statement.
"We never set out to mislead anyone, but we accept that we didn't communicate clearly with our customers in these cases," he said in a statement.
Campbell said Vodafone had been working to improve its processes.
"We are very focused on making sure that our communication is clear and that our systems support the offers we have in the market," he said.
Last November, Vodafone NZ was fined $81,900 for misleading customers over its '$1 a day' mobile internet plan.
Four months earlier it was fined more than $400,000 for a similar offence.
Judge Anne Kiernan last November described the company's conduct as "careless" and "inadvertent".
The Commerce Commission, through a spokesman, said it would not comment until Vodafone is sentenced on September 10.
In June, Australia's Telstra said it was in talks with Vodafone New Zealand to explore the potential sale of Telstra's New Zealand unit, to Vodafone New Zealand.