Here are the official OTA updates for EC05
To update from DI18 to EC05:
http://android.clients.google.com/packages/ota/sprint_samsung_d700/5f372cb40834.update-SPH-D700_DI18ToEC05.zip
To update from EB13 to EC05:
http://android.clients.google.com/packages/ota/sprint_samsung_d700/20428846d0d6.update-SPH-D700_EB13ToEC05.zip
Save to the root of your SD card, rename to update.zip, install via stock recovery
To update from DI18 to EC05:
http://android.clients.google.com/packages/ota/sprint_samsung_d700/5f372cb40834.update-SPH-D700_DI18ToEC05.zip
To update from EB13 to EC05:
http://android.clients.google.com/packages/ota/sprint_samsung_d700/20428846d0d6.update-SPH-D700_EB13ToEC05.zip
Save to the root of your SD card, rename to update.zip, install via stock recovery