Today is not a good day to test the apps. Read http://forums.cnet.com/7723-13973_102-596285.html
I've been back and forth with Samsung & Sprint for 2 weeks on this issue.
"Network interference occurred. Please try again later."
4G Wireless internet - bill is paid, all other wireless equipment works. I've shut everything down except the Smart TV and receive the same error.
the app icons give this error, however, if I wait for the advertising banner to cycle through to an app I currently use. I click the ad and I'm in. I can stream movies all day, but I can stream them from my icons. (HBO, Netflix, HULU plus..etc.....
SmartHub version 3.710-6.0.00061. Services installed: 23 apps (which were reset and no longer visible on screen???)