I'm looking to identify the opens via (any) mobile device so I can define a ratio of opens via mobile vs. overall opens.
Can you tell me if by adding the "Is Mobile Device" will capture all opens via a mobile device or do I need to drill down further (i.e., Device/platform)?
I ran across this article:
It will help.
Opens aren't accurate and it will be even less accurate than this. Will be directional. See
If you use Email Insights,you may find this data faster. But if you want the actual leads, you can use the method you are trying.