This is the 2543rd most frequent Korean word.
바꿔
"Change" or "switch."
In this sentence, '바꿔' means 'to change' or 'alter' something, referring specifically to the phone screen.
휴대폰 화면을 바꿔 주세요.
Please change the phone's screen.
Here, '바꿔' implies 'switching' or 'replacing' one tool with another for usage.
내가 다른 도구로 바꿔 사용해볼게.
I will try using another tool.
In this situation, '바꿔' signifies 'switching over' to a different type of music to enjoy.