Vodafone Australia are experiencing a mass outage across the country, impacting those trying to make calls and use data.

On Friday morning, thousands of users began to report issues with their data and many said they were also unable to make calls.

The carrier said the issue was affecting 4G services and data services may be falling back to 3G intermittently, causing swampy speeds.

It’s understood it’s affecting users in Sydney, Melbourne, Canberra, Adelaide, Brisbane and Perth.

It’s not yet known what’s caused it.

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