Reading data IE: Contact #s and data without data loss on motorola phones that have a screen pin lock? (WhiteHat)

I work in a facility where my boss asked me to see if I can locate a specific number in 2 identical locked Motorola phones because they are now deceased and there was a computer left behind. We know with almost 99% certainty that it is who they say they are but we would like to cororbererate the number of the individual in question with the # in his or her phone. And as I said before both phone owners are now deceased and there is a pin lock on each phone. Is there any suggested free forensic software available out there or another way possibly to extract the data without loss? Any help would be greatly appreciated.