Please try the following troubleshooting tips:


  1. Adjust the video playback settings within the app: visit the app's "Settings" menu (the small gear icon on the top right of the nav bar) and enable the "Play Video Over WiFi Only" setting
  2. Disconnect other devices from your network
  3. Clear the UMC app's cache by visiting Settings > Applications > Manage Applications > All > UMC and press "clear cache"
  4. Delete and then reinstall the UMC app