Describe the symptom
'It does not work' is less useful than noting which app, device or action fails and what happens instead.
Ask what changed
Updates, new apps, changed passwords, new equipment, storage pressure and network changes can provide useful clues.
Change one thing at a time
Multiple simultaneous changes make it harder to know which action affected the result.
Protect data first
Before resets, reinstalls or account changes, confirm that important files and settings are backed up where appropriate.
General consumer technology information only. Interfaces and menu names change. Before resets, reinstalls, storage changes or other major actions, verify that important data is backed up and use current manufacturer/service-provider instructions.