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Adding Let's Encrypt root certs to Android 6

bgstack15

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Old Android devices do not have the current Let's Encrypt root certificates installed, e.g., Android < 7.0.

You might need to enable a screen lock password or pin (Settings -> Security -> Screen lock -> PIN). You can remove it after installing these certs.

Install these certificates for "VPN and apps." Note that old Android might want to download these as a .crt file extension, in order to prompt you to install them as a trusted root, which is left as an exercise for the reader.

  1. ISRG Root X1 https://letsencrypt.org/certs/isrgrootx1.pem
  2. Let's Encrypt R3 https://letsencrypt.org/certs/lets-encrypt-r3.pem

References

Weblinks

  1. Ripped directly from How-to install a root certificate on Android 6.0 devices? – Geolantis.360 Knowledgebase
  2. Extending Android Device Compatibility for Let's Encrypt Certificates - Let's Encrypt

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