On previous Sony devices (as the T I own for example) this meant certain services stopped to work, such as:
- The video app has the ability to download previews/covers for (generally known) movies you have in your library. Gracenote is behind this as a service, this function does not work without the DRM keys.
- The same holds true for the walkman app, it can automatically tag, name and download a cover for your mp3's. This stopped to work upon unlocking.
- Sony also bundles it's TrackID app for music recognition (Shazam, Soundhound, eeh?) with its devices. Now this app is available on the store and can be freely used on any device, before that it only worked on Sonys and only with DRM keys.
I always root and remove stuff like the following which I classify as "bloat", so I'm not a 100% positive here, but I believe it also is true:
- Sony bundles some stores with its devices, it's own movie store, it's own music store and I also believe ebooks and stuff like that. I believe these also stop working after unlocking. As said, not a 100% positive.