Is it possible to recover deleted contacts from my Samsung galaxy s4

Hello, I’m new here for help, yesterday I mistakenly press the deleting button on my Samsung S4, and all contacts were gone, how can I recover deleted contacts from my Samsung S4? Please help!

 

Hi, Luckman. Welcome to Major Geeks.

Unfortunately, if you didn't create a backup of your contacts and store the backup on your micro SD card for restoring it or if you didn't sync your contacts with Google, you're faced with re-entering all of your contact information. Sorry.

 

As long as you had Google or Samsung Sync setup. You should be able to recover. Now if it deleted from the sync account, you may be SOL.

Do the contacts show up in your gmail.com account, if you go to it on a computer?

 

Oh, I didn't backup my contacts to Gmail or other place, can I still restore them? PS: I google and found some software says it can recover lost data from Samsung, like: iStonsoft Android recovery, Coolmuster or Vibosoft, does anybody used them?

here is the link:
http://www.coolmuster.com/android/recover-deleted-contacts-from-samsung.html

istonsoft
http://www.istonsoft.com/mobile-phone/recover-contacts-from-android-phone.html

please give me some suggestion!!!!

 

I haven't used the apps but, it seems to me once something is deleted from solid state memory, it's gone. Unlike a hard drive where the reference to the file is deleted but the file remains until overwritten.

 

@Luckman,

I took a look at the links you provided. The first one is a "free trial" and may not recover all of the contacts.