Telstra
From the post:
To help our customers check on friends and relatives affected by Tropical Cyclone Winston, we’re offering free standard voice calls and texts made from personal post-paid mobiles and fixed lines to Fiji from 5pm AEDT on 20 February until 5pm AEDT on 27 February.
For personal pre-paid customers, we’re offering a refund of the costs of your standard voice calls and SMS to Fiji from 5pm AEDT on 20 February until 5pm AEDT on 27 February (refunds will be applied by 7 March).
Please keep in mind that disruption to services in Fiji may impact calls getting through.
Virgin Mobile
Also available on Virgin Mobile from 24 February until 8th March. See Facebook post
Our Postpaid and Prepaid customers are able to make free calls to Fiji to check on friends and relatives, effective from tomorrow (24th February) until 8th March.
Optus
Also available on Optus for prepaid, landline and postpaid customers. Available from 12:01am AEDST Wednesday 24 February until 11:59pm 10 March, 2016. See media release
Optus consumer customers with a prepaid or post-paid mobile, or home landline will receive free standard voice calls to Fiji from 12:01am AEDST Wednesday 24 February until 11:59pm 10 March, 2016. Calls made to Fiji during this time will not be charged on your next bill.
Vodafone
For Vodafone customers who have exhausted their international calling allocation or are not on eligible plans, there will be no cost for their calls to Fiji from 2am AEDT on 25 February to 5pm AEDT on 2 March. All calls made by postpaid and prepaid customers to Fiji during this period will be free-rated.
Do you think they'd appreciate the old "Is Mr Wall there?" joke?