It is mandatory to set up a Signal PIN, which will be required when reinstalling the messaging app, backup & restore, and identity verification.Īlso Read: How To Check Whether Your Signal Messages Are Secure & Private? 3.

Signal PIN is an extra layer of security for implementing 2-factor authentication. Upon joining Signal, you must have added a 4-digit PIN but do not confuse it for the Screen Lock feature mentioned above. Select Privacy and toggle Screen Lock option.Tap on your Profile Icon on the top-left corner.The best part is that this app supports Android and iOS bio-metric authentication for easy unlock. It also removes the need to use third-party app lockers thereby protecting your privacy even further. Enabling Screen Lock protects your messages from unauthorized access. I know that the Screen Lock feature on Signal isn’t exactly a hidden one, but it’s definitely one of the best Signal features. Hence some of the options may appear differently on iOS. Note: The features mentioned below have been tested on Android for this article.

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