If you're looking for a report that can give you customers' phone numbers based on their purchases, you can make that happen in the Orders Module by customizing an Export Configuration to do so. Then you can optionally search for a particular Master SKU using the Orders Search function, and export your search results with your new configuration.
In your particular case, you can create custom order export settings to include the information that you need for this report, then use these settings to export the relevant information from Extensiv Order Manager. Your custom order export settings may look like this:
The information will then be emailed to you in the file format you specified in the order settings.
For the detailed steps on exporting order information out of Extensiv Order Manager, click here.