How can I recover deleted pictures from my HTC Desire 626s Gallery

[AC Question]

I do not have an sd card or any kind of backup.

 

[belodion]

Alas, they're gone.

 

[Rukbat]

You could a) root the phone and b) install an app like DiskDigger undelete (root). But that might overwrite some of the pictures you're trying to recover. (Writing anything with any app can do that.)