i remove my android system UI

[AC Question]

S6
SM-G920G Android Version 5.0.2
baseband version G920FXXU1AOBN

when i click to any app say Unfortunalely, setting has stopped

i need help please

 

[trisprior]

Factory data reset let me know if it worked

 

[cadam348]

i did that didnt work

 

[cadam348]

i did that didnt work

 

[trisprior]

Install a stock rom then its the only solution

 

[cadam348]

how to get the stock rom ? to install it