Accounts, Sessions and Device Trust

Understand how phone security depends on account recovery, active sessions, screen lock and trusted devices.

Core ideas

Use these points to build an accurate technical model before changing the device.

• Use a strong screen lock and protect the email account that can reset other accounts.
• Review active sessions and remove devices you no longer control.
• Store recovery codes somewhere that does not depend on the same phone.

Decision rule

Biometrics improve convenience, but recovery and fallback credentials still determine the security boundary.

Apply it on your phone

Record the device facts, source and expected result. Make one reversible change, observe the outcome, and keep the evidence needed to undo it.