For certain reason to deleted or lost contacts from Samsung , and now you want to recover them from phone , if you have made backup of the deleted contacts ,you can easy recover them from backup , but if you didn't have, you can only use the recovery tool to scan the phone device or phone memory , in order to recover deleted contacts from android, above all ,in this situation ,the first thing you have to do is stoping using app on the phone , you should never add some new data , because they can take up some space on the phone , to prevent the deleted contacts from being overwritten on the phone memory , as long as you deleted contacts has not been overwritten , it is possible to recover deleted contacts from android , i have successed recover deleted photos from Samsung with the help of it ,