For US users, below is the list of download links available for the following carriers – AT&T, Verizon Wireless, T-Mobile and Sprint. Both English and Spanish versions are available for download except for Sprint, which only have English version.
After you’ve selected your carrier, you’ll be redirected to a Samsung’s Galaxy S4 product page. On the product page itself, click on the See All Downloads option. After that, choose whether you want to download the English or Spanish PDF manaul for the device.
For users from other countries, the Samsung Galaxy S4 manual is also available in several other languages.