Got an older Android phone? You may soon get locked out of a lot of top websites Android phones

A large number of websites and online applications may begin malfunctioning or even fail to load entirely on older Android devices – those running Android 7.1 or earlier – from early next year due to an SSL certification issue. 

The problem revolves around a cross-certification held by Let’s Encrypt that is due to expire. Essentially, when a new certification authority is established, it often seeks a cross-signature from an authority that is already established. This is what happened when Lets Encrypt started out in 2016, when it secured a cross-signature against IdenTrust’s DST Root X3 certificate.