The new breed of smart phones connect using the MTP (Media Transfer Protocol).
These get registered under the "Portable Device" and not under the "USB Controller" in the Device Manager.
Using Symantec we are only able to block the connectivity of all such devices using the Class ID but we are not able to control them.
If we use Symantec's USB Read Only policy these devices are able to cut through this policy and write to the device.
Please find a way to control these devices using MTP so that the security threat can be controlled without affecting the functionality of these devices.
Looking forward to avail this feature in the up coming release.
Cheers,
Berino Laban - A Satisfied Customer with a Serious Security Concern and Request!!