A small everyday example
Fictional example: Sophie leaves her phone on the table during lunch. An appointment reminder reveals more personal detail than she expected. She still wants to hear reminders but does not want their full wording displayed. She need not turn off every notification. First she identifies the app producing the text, then changes its preview setting. Afterwards she checks the genuinely locked screen instead of assuming that the chosen menu option has achieved the intended result.
Inspect the starting point without real secrets
Ask someone you trust to send a neutral message or create a harmless appointment of your own. Do not use genuine verification codes, medical details or private conversations as test material. Lock the phone and put it down. Face recognition may unlock it when you look at it, so check the locked state carefully without sharing your passcode. Observe not only the text but also the sender name, app icon and any option to reply from the lock screen. These details tell you what needs changing.
Reduce previews deliberately
Open the operating system’s notification settings and select the relevant app. Depending on the device, you may be able to hide previews or reveal them only after unlocking. Some apps have additional settings of their own. Names and available options vary by model and version. Decide whether a neutral alert is sufficient for each app. A messaging app may need a sound without readable text; a calendar title alone can reveal private information. Change one setting first and check its effect before moving on to another.
Check privacy and practical availability together
Repeat the test and confirm that useful alerts still reach you in the intended way. Hidden previews are different from muted notifications or a focus mode. Consider connected watches and other screens that may display the same messages. Emergency information is a separate area: decide intentionally what should remain available while locked, rather than disabling everything. If alerts support health needs or a caring arrangement, take their necessary availability into account when changing their presentation. This guide concerns display choices, not medical monitoring advice.
Finish with a repeatable check
Record only which apps you adjusted and tested. You do not need a photograph containing private lock-screen messages. Test again after replacing the device, because transferred settings may behave differently. These steps reduce what is visible nearby; they do not prevent every kind of account access or protect an already unlocked phone. Consult current manufacturer help if the options are unclear. Someone can show you where to look without needing your screen-lock passcode or access to private message content.
Your checklist
The checkboxes are for your own reference. No entries are sent to us. To keep a copy, print the page or save it as a PDF using your browser menu.
Common questions
Does hiding a preview also mute the phone?
Not necessarily. An alert can often remain visible or audible while its content is hidden. The available combination depends on the device and app.
Why can I still read the text during the test?
The device may have recognised you and unlocked already. Check that state first, then inspect the individual app’s settings. Do not give another person your passcode just to test the display.
Do I need to disable all notifications?
No. The aim is appropriate visibility. Start with apps whose contents would be particularly private on a shared table, and check the consequences of each adjustment.
Sources and further information
Primary sources from public authorities, consumer organisations and providers. A source may be in another language; follow the guidance that applies to your service and where you live.
- Apple: Change notification settingsSource review date:
- Google: Control notifications on AndroidSource review date:
