Excel Duplicate Removal by Phone

I have several Excel workbooks that contain customer records and I’ve noticed the same phone numbers appearing more than once. Your task is straightforward: scan every sheet, spot rows that share an identical phone number, and give me back a version of each file where those duplicates are either eliminated or clearly flagged on a separate tab—whichever you find cleaner to implement. I do not need help with missing values or formatting issues right now; the focus is solely on duplicate detection. Excel-native solutions such as advanced filters, Power Query, or a short VBA routine are all acceptable, as long as the final files open without macros blocked warnings and every surviving record is unique by phone number. Please provide the cleaned Excel files plus a brief summary of how many duplicates you found per sheet so I can double-check the results quickly.