iphone delete all contacts at a time how...?????
For delete your contacts from follow below steps
Download the Groups app on your .
Download Groups app for
after installing Launch the Groups app on your .
Grant the Groups access to manage all your contacts when prompted.
after Select All Contacts/groups from the Groups list.
Go through your contacts and mark all contacts to delete
choose circle outline to the left of their name.
Tap to Choose Action at the top.
iphone contacts deleted
Tap on Delete contacts... and see one popup menu.
Tap on Remove button from my to confirm to delete