T-Mobile’s Shadow - otherwise known as the HTC Juno, and which SlashGear reviewed in November last year - has had a software update which introduces what the carrier is calling “audio postcards” (but which sound suspiciously like MMS messages, albeit with MyFaves branding) as well as a variety of free music, ringtones and wallpapers including artists Avril Lavigne and Dave Matthews Band.

The update is free, but be warned that installing it will wipe all existing data from your Shadow.  It apparently also improves “text entry”, likely an HTC update for the SureType two-letters-to-a-key system, and changes the UI for MyFaves.