Dear Grandstream Customers,
Firmware 22.214.171.124 for DP752/750/760/730/722/720 is now released as official. Here is the link to the release notes:
The firmware and release notes can be downloaded from: http://www.grandstream.com/support/firmware
Please contact us should you have any issues. Thank you for your support for Grandstream products.
Grandstream Networks, Inc.