Guys I just change my break pad, previously its has whistle sound while breaking but u just after changing to new one today morning but it has the same sound again , any one knows why?
Need help guys

wait warm up only...need to drive a bit longer.

if issue still persists, go to another mechanic and check.

You need to lube the brake pads retaining clips.

https://www.youtube.com/watch?v=ow60E4ufW8U