Iphone passcode bypass help

[m9g]

Hi

My father-in-law passed away recently and my mother-in-law has asked if i can get into his iphone4 but we dont know the 4 digit passcode, is there a way of getting past this please.

I know we can reset the phone and restore from backup but he never did a backup so cant wipe it first and he never used itunes.

We also dont know his apple ID

This isnt dodgy its an actual genuine request

Many thanks

M9G