A month after Optus rolled out their Jelly Bean update for the Samsung Galaxy S2, Telstra are beginning their rollout. The Jelly Bean update which was approved for deployment by Telstra on the 17th of May is now rolling out, with users reporting the update arriving as an Over The Air(OTA) update. The new firmware brings the device up to Android 4.1.2 with Firmware version I9100TDVLS3.
The update should appear as a notification on your phone to download, but as with most updates the release will most likely be staggered so keep checking. Remember you can also check for updates using the Samsung Kies software.