Guest Profile / Multi-User Switch
Detection
Device status bar shows user switcher icon; main user profile inactive while device in use.
Fix (technical)
On child device: Go to (siehe ui_strings_ref)Mehrere Nutzer). Toggle „Use multiple users„ to OFF7. Restrict access to (siehe ui_strings_ref) via Family Link.
Fix (relational)
Reiterate clear household rules regarding shared device usage and account transparency.
Residual risk
Some custom Android vendor skins (OEM OS builds) re-enable multi-user features after system updates.
Sources
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google-family-screentime-en
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google-family-removeaccount-en