Optus has launched a 28-day SIM for overseas visitors that offers unlimited calls and text within Australia, as well as unlimited calls and text to 15 international destinations, and 60GB of data.

It also gives users a 15 percent discount on more than 2000 experiences across Australia, bookable via the “My Optus” app.

The SIM is presently on sale only at major airports and its usefulness degrades with renewals. The first and second renewals get only 35GB of data and subsequent renewals only 10GB.