To set the Newsletter on Footer also in Header section: Must follow below steps..
FOR THE FOOTER:
Go to app/design/frontend/default/your_theme/layout/ open newsletter.xml
Check the Block like:
Replace with below code:
And Now In Your Footer.phtml file
app/design/frontend/default/your_theme/template/page/html/
add the following codegetChildHtml('footer.newsletter'); ?>
FOR THE HEADER
newsletter.xml
Add this code
And Now In Your header.phtml file
app/design/frontend/default/your_theme/template/page/html/
add the following codegetChildHtml('header.newsletter'); ?>
That's it.
OR
We can add in any phtml file by calling direct block.
getLayout()->createBlock('newsletter/subscribe')->setTemplate('newsletter/subscribe.phtml')->toHtml(); ?>