In my phone Samsung galaxy M21, a blue spot has generated automatically in the display and it is increasing in size day by day. Although there is no dropping and other physical damages.
Seems to be you have Voice Assistant enabled, therefore please follow the steps below to disable it. While Voice Assistant is active, you can tap on an area to highlight it with a square, then double tap to select it.
We acknowledge your query and apologize for the inconvenience caused to you and will surely assist you regarding the same. We request you to kindly visit the service center for a physical inspection of your device. You can locate your nearest service center with this given link: https://www.samsung.com/in/support/service-center/
