security – “Breaking” into Samsung phone

one of my colleagues has recently passed away and I am left with a task to retrieve data (especially pictures) from his phone – Samsung Galaxy A3 (2017).

Unfortunately, he set a numerical code to lock the screen and I was unable to get through it with any convential methods I found online – all require access to Samsung account, or Google account, or some other prerequisities, that are not fulfilled in this case.

Does anybody have any trick to get pass the security?

Thank you!