A80 hangs after i lock my device. This issue arrived after i replaced my display.

[lminvti]

Hi there 👋, and warm welcome, where did you replaced the screen? If it was authorised Samsung’s repair shop? Or it was just 3rd party repairs shop ? If it was samsung and you have issues I would suggest go back and explain issue I'm sure they would help you further, if it was not authorised repairs shop I suggest same as they tend to put non genuine part in phones sometimes unfortunately

[BandOfBrothers]

Hello @Sandip865 and Welcome to the Samsung Community Forum Section for Uk and Eu Members. 

As you have replaced the display from the way you have explained, then you may have inadvertently caused issues inside the phone. 

A Samsung Service Centre could help however as the work has been carried out not be an authorised Samsung Service Centre a fee could be charged. 

If i can be of any further help please don't hesitate to ask  😎