After experiencing the similar Samsung
phone deleted photo loss troubles, I had learned that you often could retrieve
lost android phone files and contacts from its inner used memory card with
phone data recovery freeware.
Honestly, I did have tried several ones and
got some successes last time, like:
Recuva – free and fast, but, many retrieved
files could not be used
iCare Data Recovery Free – completely free
and good to take most of my phone pictures and songs.
PhotoRec-free, but, not easy to understand
And you’d better also go search some ones
and see which one of them was proper for your case.
And this article may help you anyway:
18 Top Tested Free Data Recovery Software
Hope my words can help you out anyway.