cosmetic changes

{% include alerts/danger.html content="The FP4 comes with an anti-rollback feature. Google Android anti-roll back feature is supposedly a way to ensure you are running the latest software version, including the latest security patches.

<br><br>If you try installing a version of /e/OS based on a security patch that is older than the one on your device, you will brick your device.

Click on `Details` below for detailed information<br>

<br><br>If you try installing a version of /e/OS based on a security patch that is older than the one on your device, you will brick your device. Click on `Details` below for detailed information<br>

<details>

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To check the security patch level on your phone with a locked bootloader, prior to installing /e/OS, open your phone `Settings` >> `About Phone` >> `Android Version` >> `Android Security Patch Level`.Then compare it against the level of the security patch on the /e/OS build as visible in the Downloads for the FP4 section below.

<br><br>To check the security patch level on your phone with a locked bootloader, prior to installing /e/OS, open your phone `Settings` >> `About Phone` >> `Android Version` >> `Android Security Patch Level`.Then compare it against the level of the security patch on the /e/OS build as visible in the Downloads for the FP4 section below.

<br><br>The following values control whether anti-rollback features are triggered on FP4:

<br><br><strong>The following values control whether anti-rollback features are triggered on FP4:</strong>

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<br> * Rollback protection errors trigger if you install an update whose version number is `LESS` than the rollback index's value stored on device.

<br> * The value of rollback index is `UPDATED` to match `ro.build.version.security_patch`'s value of the currently installed version, but only if the bootloader is `LOCKED`.

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Here are some examples to help you understand how anti-rollback features work:

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<strong>Example 1</strong>

<br> * Your FP4 with Google Android has a Security Patch Level saying June 5, 2022