iPhone needs to cool down

Hello Sagar goti,

Thank you for using Apple Support Communities. Based on your post, you've provided a screenshot of your iPhone showing a temperature warning.

When you see an alert like this, we recommend following this resource: Keeping iPhone, iPad, and iPod touch within acceptable operating temperatures

See section, 'If you see a temperature warning screen' specifically.

After some time of no use, does this alert disappear as expected?

Hoping this helps out, take care.