Dear Grandstream Customers,
Firmware 1.0.13.3 for HT813 is now released as official. Here is the link for the HT813 release notes:
http://firmware.grandstream.com/Release_Note_HT813_1.0.13.3.pdf
The firmware and release notes can be downloaded from:
Please contact us should you have any issues. Thank you for your support for Grandstream products.
Technical Support
Grandstream Networks, Inc.