Deleted photo recoery

Hi

You didn't say what make etc. of phone you have. On my note 2 the wallpaper is saved in the folder

/data/data/com.sec.android.gallery3d/lockscreen_wallpaper.jpg

This however is only accessible with root access (with root you would not need a recovery program). Assuming its in a similar location on your phone, if you change your lockscreen you may loose it permanently.

You could try using a file manager to search for "lockscreen" in case its not in a restricted location.

Roger

 

I guess you can try file recovery apps on Google Play.

 

I can only think about using 3rd party tools, while you can try Roger's solution firstly.