$1400 bonus giftcard for Telstra 24 month is looks good deal. Monthly plan cost is $99.
https://images.ctfassets.net/xa93kvziwaye/79ic9iSFjV7e6E4VS1…
See also $1100 gift card for JB Hi-Fi Mobile $99/Month 24-Month Plan
Update- this offer applicable for new number as well even the ad says only port in.
600-99