For projects that require dialing both landline and cell phone numbers, a combined "preferred phone" column is necessary.
To create this column:
1. Identify the two columns containing the landline and cell phone records.
2. Create a copy of the landline column in a new column, and rename the header to "preferred_phone".
3. Apply the data filter function to the entire spreadsheet.
4. In the new "preferred_phone" column, filter to show only blank cells.
5. In each blank cell, enter the formula "=", then click on the corresponding cell in the cell phone column. Press Enter.
6. This will populate the "preferred_phone" column with the cell phone numbers.
7. Remove the data filter to show the full spreadsheet.
8. Select the entire "preferred_phone" column, copy, then paste as values to finalize the column.
9. Save the spreadsheet with the new "preferred_phone" column.
This step-by-step process ensures a clear, consolidated "preferred phone" column that combines both landline and cell phone numbers for easy reference and dialing.