One fix that will be corrected is the battery drain that has been taking place when the phone is set on Wi-Fi and is doing nothing in your pocket. Another fix now allows Amazon MP3 to download in 4G. Upload speeds for 3G will be improved and that should help the user get better load times for large e-mails. For more information on this firmware upgrade, check out the source link below.
Samsung Epic 4G Specifications | Review