My phone keeps on shutting down, i don’t know why. I just bought it last February.

Hi there bii08,

We see that you are having an issue with unexpected shutdowns on your iPhone 11. We are happy to assist you with resolving this issue.

Please follow the advice here to address this issue:

If your iOS device restarts or displays the Apple logo or a spinning gear unexpectedly

Kind regards.

Hi bii08 ,

Thanks for this clarification. If you've followed the provided article, we would recommend you contact Apple Support here: Get Support

Best wishes.