If you’re rocking a Lumia device from Telstra and are yet to make the switch to Denim, chances are you will be able to do so by the end of the month. The Australian carrier has mentioned that the update is currently in testing for handsets such as the Lumia 520, Lumia 625, Lumia 920 and Lumia 1320, with these devices scheduled to receive the update starting March 30. Lumia 925 and Lumia 1020 are slated to get the Denim update a week earlier, with Telstra planning to commence rollout on March 23.