All your deleted data just like photos,video,music are still on your Android mobile or from SD card or Android mobile(such as HTC, Samsung, Sony,Motorola, LG, etc.).You can recover those deleted contacts,contacts,photos,video,music with Android data recovery software.You can get them back only One click to scan all lost photos & videos from SD card or Android mobile.
Read more: how to recover contacts from Android phone

how to recover contacts from Samsung Galaxy