A weird sound on pressing brake pedal

[sohailgill]

I have xli 2016, 100000km on odo, i have recently changed the brake pads, now on pressing brake pedal slightly hard there is a sound from front "tuck", almost every time, i have showed it to my mechanic but he was unable to tell me the cause, please if anyone has some suggestion about it, i think i comes from front left side

[aziz.rehan]

Which brake pads did u used exactly?

[sh3hryar]

I faced similar issue after having break serviced at dealership. I took the car back - they fixed it.
Although the dealership didn't mention the issue, however they re-installed all the brake pads and the noise for gone.