Delete multiple contacts at the same time with the bulk delete contacts through the Tags feature.
Go to the Tags menu, and it will display the list of tags.
Pick and choose a tag with the number of contacts of that tag, and the checkbox will only show if the number of contacts is greater than 0/zero.
Click the delete button and check the checkbox to delete the tagged contacts.
Enter the total number of contacts in the input field to continue or confirm the delete process; when the entered total number of contacts in the input matches the given number, the Delete button will be enabled.
Click the delete button.
After clicking the delete button, the selected tag should be stripped out from the current view list, and after a few seconds or so (depending on the number of contacts ), a popup notification will be shown on the right side of the page.