Android 5.0 Lollipop for the Samsung Galaxy S4 LTE-A (GT-I9506) has been available in Germany, the Czech Republic, and Slovakia. Rolling out is actually the Android 5.0.1 update already. The official OTA notification should be arriving soon or you can upgrade your phone using Kies. Of course, those who understand the advanced coding can simply download the firmware and install on their own.
Sam Mobile has provided a list of countries getting the Android 5.0 Lollipop update for the Galaxy S4 LTE-A and so far, only three countries are getting the firmware. Other countries like Australia, Austria, Croatia, France, Greece, Hungary, Ireland, Netherlands, Norway, Poland, Singapore, Spain, Sweden, and the United Kingdom have yet to receive the official Android Lollipop update but it should arrive soon.