Deleting multiple or all contacts in latest android devices is little irrigate, there is no straight forward way to do this, to doing this we need to use third party app, but here I will shows how to do this without using any app, hope this will help you, so let see how to delete multiple or all contacts in android phone and tablet
1. Don’t try to delete multiple contacts from dialer, you need to open the contacts app in your phone; than hold on any contacts for few seconds, now select multiple contacts and than delete
2. To delete all contacts, go to phone “setting” open “app or app manager” open the “contacts” than tap on “storage”
3. Now tap on “Clear Data” and “Clear cache” remember this is will delete all contacts, so do it on your risk