The following is a guide on the compatibility of OpenZDK on different firmware versions. To find your firmware version, open the main menu of your Zune. From there, navigate to settings > ABOUT > ZUNE. Among other information, your Zune's firmware version will be displayed.
Warning: Firmware versions beyond 3.3 and 4.5 are highly likely to break OpenZDK compatibility. Do not upgrade without consulting the Zune Development Wiki beforehand.
| Zune SD | Zune HD | Compatible | Notes |
|---|---|---|---|
| 1.0 | No | ||
| 1.1 | No | ||
| 1.2 | No | ||
| 1.3 | No | ||
| 1.4 | No | ||
| 2.0 | No | ||
| 2.1 | No | ||
| 2.2 | No | ||
| 2.3 | No | ||
| 2.5 | Yes | First version compatible with XNA | |
| 3.0 | Yes | ||
| 3.1 | Yes | ||
| 3.2 | Yes | ||
| 3.3 | Yes | Recommended | |
| 4.0 | No | Non-functioning firmware installed out-of-the-box | |
| 4.1 | Untested | Not compatible with 3D applications designed for 4.5 | |
| 4.3 | Yes | Not compatible with 3D applications designed for 4.5 | |
| 4.5 | Yes | Recommended |