diff --git a/docs/os/android-overview.md b/docs/os/android-overview.md
index b56c2895d..bce5019cd 100644
--- a/docs/os/android-overview.md
+++ b/docs/os/android-overview.md
@@ -194,3 +194,7 @@ This is not without its caveats:
 If you live in the United States and use the stock operating system, we recommend using Google Fi as your carrier to take advantage of the end to end encrypted calls. People using up-to-date Google Pixels will benefit the most from the VCN as mentioned.
 
 If you use GrapheneOS and do not mind installing Sandboxed Play Services, Fi is still a better option than other providers thanks to Google's general good security practices and the fact that you can enroll in the Advanced Protection Program to have much better protection for your account. Some other providers do not even have multi-factor authentication support, and most will not let you enforce FIDO2 as the authentication method.
+
+## Sources
+
+- [Android Tips | PrivSec](https://privsec.dev/posts/android/android-tips/#google-messages)