Unknown Symbol on Phone

[Zalabhai]

My M30s phone has a symbol showing "locked wallpaper" ,  on lock screen. And three is "istock@gettyimage/yin-yang" written on top of the screen. 

I don't know how to get rid of it and please can any one tell me what is symbol means? 

[galaxyboi]

bhai power off karke on karo thik ho jayga

[AjaiX2015]

Getty images is a stock photo provider with huge collection of photography regarding various subjects including historic events.
Many companies use their photos for representational purposes or even educational purposes.They hold the copyright to their pictures and thus the tag stock Getty images. It is visible on all the pictures the company owns.

[Zalabhai]

Thank you EVERYONE, As suggested to restart the phone symbol and the written note is gone..... Once again thank you for the help

[prakashbarad]

restart karne pe chala jata he but firse Vapas same thing dikha raha he mere device me.. har bar restart karna solution nahi he na

[prakashbarad]

any permanent solution for this problem ?

[Anikroyale]

Turning off wallpaper services.

[Ankurmallick]

very very thanks to u guys, this problem appeared in my phone today, and after restarting it disappeared, thanks !! 😄

[Himanshu0976]

ye wala symbol

[sanjeevi007]

My A51 phone has a symbol showing "locked wallpaper" ,  on lock screen. And three is "istock/Gettyimage/yin-yang" written on top of the screen. 

I don't know how to get rid of it and please can any one tell me what is symbol means?