This is what i have on wpcentral.com
Firmware version 1028.3562.1407.1001, this fixes the auto-brightness bug and improves screen touch sensitivity. the Bluetooth enhancements bug fix, and other minor bug fixes found in the international Lumia 1520 update. It also makes the phablet runs smoother
Firmware version 1028.3562.1407.1001, this fixes the auto-brightness bug and improves screen touch sensitivity. the Bluetooth enhancements bug fix, and other minor bug fixes found in the international Lumia 1520 update. It also makes the phablet runs smoother