Remember the GPS fix for the Samsung Vibrant which was pulled back from KIES for unknown reasons? As promised earlier by T-Mobile, they have released the firmware update via OTA (Over-The-Air). The new firmware update (JI6) improves the lag issues along with the GPS performance and also brings the Media Hub’ application to the Vibrant. 
Here is the official change-log from T-Mobile-:
*GPS, SGPA, SUPL
*Exchange inbox
*Contacts Sync
*The Sims 3 10th Anniversary Edition
*Battery indicator
*Calendar alert chime
*New Services: Samsung Media Hub
*40+ bug fixes, UI changes and update
People over at XDA-Developer forums have been reporting that this firmware update has made the phone snappier as well.
The OTA will be rolled out in phases by T-Mobile to all the Vibrant handsets out there until the end of October.
