To take advantage of that deal, you need to install a specific Skype app based on whether you use Vodafone or 3. (The specialised app ensures that data used on your Skype calls doesn’t get discounted from your general data allowance.)
There’s an obvious caveat here that Vodafone’s network reliability could make it a challenge to get your $3 a month in value, though for international calls that threshold wouldn’t be hard to cross. It’s also not an option if you use an iPhone, BlackBerry or Windows Phone 7 device.
The Cheapest NBN 50 Plans
Here are the cheapest plans available for Australia’s most popular NBN speed tier.