Adding custom ringtones through the Android file system If you find your ringtones other places — or have one you just need to add to the phone — then you'll need to get it into the proper folder in the Android file system, and that requires a file manager app. Just don't like the lame, old sounds that came with your sweet, new phone? Zedge even streamlines the process, letting you download and set your ringtone from the same screen! Finding a ringtone Now, maybe you already a ringtone you've been using since , or maybe you need to find a new custom alarm that you can't tune out when you need to get out of bed and catch your flight. You can make any MP3 a ringtone, but most phones will go to voicemail after seconds, so there's no need to make your ringtone longer than 30 seconds. Once you've downloaded your new ringtone to the device, you'll copy it from the Downloads folder into the Ringtones folder or Notifications or Alarms, if that's what you're trying to set , then reboot your phone. So if you do want to use a song from Google Play Music, you'll need to download it on a computer using the Google Play Music Chrome app or the Google Play Music Manager — which means you have to own it, not just listen through your Play Music subscription — then clip it down and add it to the Ringtones folder like you would any other custom-made ringtone.