Snom320/Firmware Update Wizard

From Snom User Wiki

1. My snom320 is running a firmware version 7.X (below 7.3.7).
   • I would like to update to the latest released Version 7.3.7.
   • I would like to downgrade to the latest released Version 7.1.35.
2. My snom320 is running a firmware version 7.X (below 7.1.35).
   • I would like to update to the latest released Version 7.1.35.
   • I would like to update to the latest released Version 7.1.33 + updated bootloader V 1.1.3S (eliminates EHS boot problems).
   • I would like to downgrade to Version 6.5.13.
3. My snom320 is running a firmware version 6.X (below 6.5.18).
   • I would like to update to the latest released Version 6.5.18.
   • I would like to update to the latest released Version 7.1.35.
4. My snom320 is running a firmware version 5.X, 4.X or 3.X respectively.
   • I would like to update to the latest released Version 6.5.18.
   • I would like to update to the latest released Version 7.1.35.
5. I don't know which firmware version is installed on my snom320. Where can I find this information?
6. Where can I find release notes and download links to older firmware releases?
7. Where can I download the source code of components licensed under GPL? and where can I find the original GPL license text?