diff --git a/static/install.html b/static/install.html
index e16c394c..a31d8622 100644
--- a/static/install.html
+++ b/static/install.html
@@ -41,6 +41,11 @@
             <p>You should have at least 2GB of free memory available.</p>
             <p>You need the unlocked variant of one of the supported devices, not a locked carrier
             specific variant.</p>
+            <p>You should verify the device already has up to date factory firmware installed
+            before flashing GrapheneOS, to avoid issues with OEM unlock toggle on some
+            devices. Factory firmware and installation instructions can be found at
+            <a href="https://developers.google.com/android/images">
+            https://developers.google.com/android/images</a></p>
             <p>You need an updated copy of the <code>fastboot</code> tool and it needs to be
             included in your <code>PATH</code> environment variable. You can run <code>fastboot
             --version</code> to determine the current version. It should be at least