Comment 3 for bug 1193161

So far I've tried to workaround which involve modifying /lib/udev/rules.d/65-android.rules.

The first modification was to add:

ACTION=="add", KERNEL=="rmnet_mux_ctrl", OWNER="radio", GROUP="radio", MODE="0640"

This has no effect on the presence of the rmnet_usb* devices.

The second attempted workaround was to add the following additional rules to 65-android.rules:

ACTION=="add", KERNEL=="smd7", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="smdcntl0", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="smdcntl1", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="smdcntl2", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="smdcntl3", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="smdcntl4", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="smdcntl5", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="smdcntl6", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="smdcntl7", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="smuxctl32", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="rmnet_mux_ctrl", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="hsicctl0", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="hsicctl1", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="hsicctl2", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="hsicctl3", OWNER="radio", GROUP="radio", MODE="0640"
ACTION=="add", KERNEL=="mdm", OWNER="radio", GROUP="radio", MODE="0640"

These also have no effect on the additional rmnet_usb* devices.