The devil is in the data when using a cellphone overseas, with one carrier charging 60 times its New Zealand rate for customers travelling across the Ditch.
2degrees bills $30 per megabyte for email or mobile internet while roaming in Australia, 5900 per cent more than its local price of 50c per megabyte.
This is three times higher than Telecom's casual roaming rate of $10 per megabyte and six times higher than Vodafone's $5 per megabyte.
Are mobile roaming charges unreasonable? Here is the latest selection of Your Views: