According to Liliputing, if you have an Android 2.3.7 or older device, Google will not allow you to sign in to your Google Account on that device beginning September 27.
The company states that Google will no longer allow sign-in on Android devices running Android 2.3.7 or less starting September 27, 2021. This is part of its ongoing security efforts. Signing in to your device after September 27 may result in username or password errors if you attempt to use Google products and services such as Gmail, YouTube and Maps.
ANDROID 2.3.7 WAS PUBLISHED ABOUT 10 YEARS AGO
Android 2.3.7 was published almost 10 years ago to explain how this change will affect older devices. But given that there are more than three billion active Android devices in the wild right now, this change will likely affect more than a few people who might still be holding on to older tech.
According to Google, if your Android version is older than 2.3.7 (or earlier), you will still be able to use certain Google services if you are logged into your browser. Google says that devices running Android 3.0 Honeycomb will still log in to their Google accounts.