Optus are bringing back the EOFY sale with a sweet 25% off contracts over 24 months. Referees also get $50 credit for each person that is referred.
"For a limited time, Optus are rewarding Family and Friends of our valued customers
Earn $50 credit for every friend you refer who signs up to a new postpaid mobile service - up to 3 friends, that's $150! Plus your 3 friends will receive a huge 25% off their monthly plan fees for 24 months.
Hurry, offer ends 25 June, 2017"