You can use the following Apple devices for update:
- iPods without iOS
- iPhone 5 and 6 trough Dension Lightning Adapter LIA1GW0 (from Lightning Adapter firmware version 005)
The update process works only in Gateway User Interface (iPod GW) mode (in which case the iPod's buttons are locked and control is only possible from the head unit).
Avoid unnecessary updates. If your system works fine as expected, please do not update!
You can get the latest update with install instructions from Dension Technical Support: https://dension.kayako.com/en-us/conversation/new