NetBSD vs. smartphones?

["John D. Baker" <jdbaker%consolidated.net@localhost>]

The smartphone I have can appear as any one of three types of devices
when plugged into another computer system via USB:

  mass storage
  MTP device
  PTP device

It is currently set to identify as a mass storage device.

When I plug it into any of my NetBSD systems, NetBSD reports it as

  umodeswitch

that the device is a mass storage device and that it is disabling
umass support.

If I reboot the system and drop into userconf to disable umodeswitch,
the umass driver attaches and reports a device but that it is offline.
It doesn't matter whether the phone is locked or unlocked at the time
of attachment, the system reports the drive as offline.

Without divulging information that might make my (or others) phone open to
compromise, has anyone else dealt with a  situation like this?

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