ACMA warn travellers to be wary when using a tablet or smartphone overseas.

They call it ‘bill shock’ and the Australian Communications and Media Authority (ACMA) has some important advice for travellers to avoid racking up unexpectedly expensive phone bills overseas.

The ACMA has released a graphic, with tips to evade these offensive invoices while travelling.

Some Australians return with a phone or data bill that may cost the same or more than their entire vacation.

The image has been posted on the ACMA’s Engage website.