T-Mobile Samsung Galaxy S III starts receiving Android 4.1.2 update with multi-window feature
T-Mobile is yet to update its support page for this particular update and device, but the first people receiving it have said they are noticing two new apps: Paper Artist and Group Play. The handset also shows the new T-Mobile “4G” logo.
You should definitely update over Wi-Fi, though, as the update comes at the pretty hefty 187MB. The first notifications have already started flying in, so make sure to double-check your device to see if the update is already there.