Not too long ago, my S3 was stolen, and I got a replacement from Verizon. Even though I didn't have my SD card and never actively backed up my files, somehow, all of them magically showed up on my new phone. So I assumed Samsung automatically backed up all your contacts, pictures, videos, etc. Recently, however, I upgraded to the S4. I just realized my contacts are all still there, but my pictures and videos are not. I already did a hard reset and sold my old phone, so there's no hope there. Is there a chance that my pictures and videos are saved somewhere in the ether??

My only other thought is, I did use the Android Lost app. Did that somehow back up my data remotely?? I just can't figure out how it made it onto my last phone without me having the physical phone...