Device access
Executor or family may need device passcodes or recovery keys; Apple/Google legacy contacts may help after death
Some steps differ by region inside the country.
Where
Their phone, laptop, and tablet. Apple and Google both operate formal legacy and deceased user processes.
How
Try known passcodes and patterns first, but be careful, repeated failures can wipe a device.
Check whether they set up an Apple Legacy Contact or a Google Inactive Account Manager, which gives you direct access.
Otherwise apply through Apple's or Google's deceased user process with the death certificate and grant of probate.
Do not factory reset anything until you are certain nothing on it is needed.
What to bring
A certified copy of the death certificate
The grant of probate, which the platforms often require
The device itself, and its serial number
Timing
Platform requests commonly take several weeks.
This is practical information, not legal, medical, or financial advice.