I would recommend testing a device that has is on the Agentry Supported Device List, as the ones on that list has all been tested by SAP QA and are known to support Agentry.
I am sorry I don't have link to atm, but I will see what I can come up, you can always open a ticket with support and get it from there.
I do know there are no Dell Venue 7 on the list.
Stephen