Hi everyone!

I'm trying to detect support for OMA-DRM Forward-Lock using the value "application/vnd.oma.drm.message" in the ACCEPT header.
This works for some devices, but a lot of devices that do support Forward-Lock don't send this value for some reason.

In some cases I've found that there is a "DRM_VERSION" header that usually equals "2.0", so i treat those devices as supported by the Forward-Lock, but how much can I trust this header? I haven't found any documentation on the web it.

Does anyone know about a way to detect Forward-Lock support on all devices?
How do you do it, besides relying on services like DeviceAtlas?

Thanks!!
Itzik.