Umar Farooque 
Android versions 2.3.7 and older will stop user sign-in support in September 2021. It is time when Google wants everyone to upgrade their android phones to a newer version. Affected devices are receiving email sent by Google to mentioning that the sig-in will not be available.
“Signing in to your account on Google apps will no longer be supported on phones with android version 2.3.7 or lower starting Sep. 27” says the email received by Google users. To continue taking advantage of Google services one must upgrade to the android version 3.0 or above.
Why Google will not support sign-in to old android versions?
In the email itself, Google mentions that this step is taken in order to improve the security of the users. The unsupported versions are too old to be secure now. They are from 2008, so it is better if users would not risk their security.
Below are the android versions that will stop working:
1- Android 1.0
2- Android 1.1
3- Android 1.5 Cupcake
4- Android 1.6 Donut
5- Android 2.0 Eclair
6- Android 2.2 Froyo7-Android 2.3 Gingerbread
According to a Google support page, the following actions will lead to a sign-in error:
- Performing a factory reset and trying to sign-in
- Changing a password and trying to sign in with the updated password
- Removing and re-adding the account
- Creating a new account on an old device that runs on any of the above mentioned Android version
Below is the link to Learn how to Check and update your android versions: https://support.google.com/android/answer/7680439?hl=en
Android 3.0 Honeycomb or older version need to sign in and use Google applications. The devices that still run on Android version will lose sign-in support to Google Apps stopped receiving operating system updates a long time ago.
