Optus
Post-paid and fixed (landline) customers
From 12:01am AEST on 24 May 2017 until midnight AEST on 28 May 2017, Optus consumer post-paid and fixed customers will receive free standard voice calls to the United Kingdom. ‘Standard calls’ includes calls to both landlines and mobile numbers. Calls made to the UK during this time will not be charged on your next bill.
Pre-paid mobile customers
From 7.00am AEST AEST on 24 May until midnight AEST on 28 May 2017, Optus pre-paid customers will receive zero-rated standard voice calls to the United Kingdom. ‘Standard calls’ includes calls to both landlines and mobile numbers.
Customers on Postpaid are able to make free calls to the UK to check on friends and relatives from 12:01am on 24 May until 11:59pm on 7 June, and on Prepaid from 5:00am on 24 May until 11:59pm on 7 June, AEST.