If you collect really old Android phones (those running on Android 2.3.7 and older), you won't be able to access Google apps, like Gmail, YouTube, Google Search, etc. The company plans to disable sign-ins for these devices. This move covers Android 1.0, 1.1 (unnamed), 1.5 Cupcake, 1.6 Donut, 2.0 Eclair, 2.2 Froyo, and 2.3 Gingerbread. It will affect the system- and application-level sign-ins, but you can still sign in if you use the Android Browser. That Android Browser wasn't Chrome yet.
Google is disabling access from these old devices to "help protect your account's security," according to an email it's sending out to owners of these phones. This change will happen on September 27. It's worth noting that these devices stopped receiving operating system updates and security patches a long time ago. The same goes for Google Play services.
Source: 9to5Google