Warning sign, no wifi no activation

Hello

i bought a iphone x with very damage screen. (Only screen and black area)

when i changed the screen, internal part seem normal and untouched. I can’t tell if the screen was the original one.

When i connect a new screen (without front earpiece flex), the phone was in dfu mode.

after restoring it with itune , a message was there iPhone couldn’t be activated because missing activation data.

When i try to activate it manually, the wifi request is empty.

i have this strange sign on top right of the screen

any advice ?

Phone history is unknown

thank you