How do change my default screen back to how it was?

[AC Question]

accidently changed my default

i downloaded an app that completely changed everything on my screen to some old version. how do i change it back and is there any other version recommended. please and thank you

 

[Javier P]

Re: accidently changed my default

Do you mean an app that you downloaded or it was a system update? Which phone do you have?