SMF - Just Installed!
well, it's really a bad fortune. My little son grabbed my phone(Galaxy S6) and deleted a lot of contacts and photos. I tried 2 free data recovery program but they seems not working on Android device. P.S. I didn't backup the contacts.
If you didn't backup your Android contacts before, i think you can't recover your deleted contacts unless try professional Android data recovery application. Like Mobiledic Android data recovery. Source: http://www.mobiledic.com/android-topic/recover-deleted-contacts-android.html
use undelete plus for recover deleted contacts
The deleted contacts is still available in the Samsung Galaxy S6, until and unless if you do not add any new data on your phone just to overwrite the existing data including your contacts. So, if you have deleted your contacts from your Android Phone that you wish to restore, then it is suggested that you must stop using your Android phone and immediately apply Android Data Recovery software to restore deleted contacts from Android phones.