Galaxy S4 is a complete Life Companion device launched by Samsung Electronics. Galaxy S4 is quickly rushed for launch in USA, Australia, India and many countries within this week and we are happy to hear that the first Galaxy S4 firmware update is available right now.Samsung Galaxy S4 GT-I9500

According to folks at Samsung-Updates, Galaxy S4 GT-I9500 owners are now seeding ZCUAMDG based minor update, also the first update to the device. But this update is now only limited to China owners only. If you got Galaxy S4, then connect your phone using the USB Cable to PC and head to Samsung KIES to check for the update. We aren’t sure whether this update is available in your location but if you are in China, source site says update is available. There is also no change in the Android firmware version as it remains Android 4.2.2 Jelly Bean only.

The source site didn’t provide further information on what this update is all about. Also we didn’t see any change log provided by them. This update right now isn't available via Over the Air download.

The details of the firmware update –
Device: Samsung Galaxy S4 GT-I9500
Region: CHN (China)
Android: 4.2.2 (Jelly Bean)

So if you are in China, make you check for this update although its a minor update.