T-Mobile's Galaxy S III (Galaxy S3) is seeing an OTA update (also available via Kies) today that promises improvements to performance and stability and adds Allshare Cast to the device. Here's the list of changes from T-Mobile support --
Android version 4.0.4/Software version T999UVLH2
AllShare Cast added to device
Resolved the error, ‘Enter MAC address' after entering the correct MAC address in the Mobile HotSpot configuration page if the MAC address entered did not contain the colons (
Resolved issue where the contents of a Home screen folder would be rearranged alphabetically after a reboot.
Resolved issue where the name does not populate when trying to add a contact with NameID information, you must manually add.
As we've seen with the other U.S. variants of the Galaxy S3, this update also removes local search ability from the phones -- a tiny piece of information that Samsung and T-Mobile forgot to mention in the change log. We expect that sort of thing by now, but we still don't like it.
Anyways, to get the update either check through your Galaxy S3's settings menu or fire up the latest version of Kies and you'll be set. For more details, and full instructions, hit the source link below.
Source: Android Central
Original Source: T-Mobile