To get a manual for the Samsung Galaxy S3, download it from the Support section on Samsung.com after selecting the device from the list of products, or navigate to PhoneArena.com and download it from the Samsung Phones section. Alternatively, download the manual from websites belonging to wireless network operators that sell Samsung Galaxy S3 phones, such as T-Mobile.
On Samsung.com, click on the Owners & Support button and select the Manuals & Downloads option. Click on the Cell Phones link, select your provider from the drop-down menu, select the model number of your Samsung Galaxy S3 phone and click Get Downloads. Click the See More link and click on the Download (PDF) button for the desired version and language of the user manual.
On PhoneArena.com, click on Phones, select Samsung from the list of manufacturers, click on the Samsung Galaxy S3 image and click on Manuals. Type the listed three-digit number to bypass the spam filter and then click the Download button.
On T-Mobile.com, navigate to the bottom of the homepage and click on Support Home. Click on the Devices icon, select the Android category, navigate to the Samsung section and click on the Samsung Galaxy S III link. Click the Additional Info button, select the User Manual option, click on the User Manual button and click the Download link. Alternatively, click the View link to open the manual using the built-in PDF reader.