Step 1: Download your favorite ringtone to your PC or MAC.
Step 2: Connect your phone to your computer using a USB cable and transfer the ringtone to your phone.
Step 3: Setting the ringtone is easy once you have the track on your phone. This can be done in two ways.
Setting a Ringtone through the Settings Menu
Step 1: Open up the Settings Menu on your phone, and navigate to the Sound option.
Step 2: There will be options to set ringtones for each of your SIM card and for notifications. Decide on the appropriate option and click on it.
Step 3: This will open up a list of all the music tracks available on your phone. Select the track that you just downloaded/copied from your computer.
Setting a Ringtone through the Music Player
Step 1: Open up your Music Player and find the track that you just downloaded/copied from your computer.
Step 2: Long press on the track to open up a sub-menu with a list of options.
Step 3: From the list, select the option to set the track as phone ringtone or notification ringtone.
Step 1: Download your favorite ringtone to your PC or MAC.
Step 2: Open iTunes and add downloaded file to Library. Now you can see ringtone at the Tones tab.
Step 3: Attach your iPhone to the computer (the easiest way – via data cable) and the devices will connect in seconds. You will see phone icon on the iTunes menu panel.
Step 4: Just start dragging selected ringtones from Tones tab and you will see pop-up panel with the connected iPhone. Drag ringtone to it.
Step 5: Finally, on your iPhone, go to Settings > Sounds > Ringtone, and select your new ringtone from the top of the list.