But make sure that the file follows Step 2 Constraints. Step 3: Now add your selected file in Zune Music Collection by just dragging and dropping the file. Also keep this point in mind that your MP3 or WAV file duration can not more than 40 seconds.
Step 2: Select any MP3 or WAV file from your PC which is less than 1MB size. If you are not having Zune application, you can get it from Official Zune Website. Step 1: Connect your Windows Phone to Zune Via Data cable wire. Steps to Add a Custom MP3 Ringtone in Windows Phones – Nokia Lumia 800 If you miss any single step, you wont be able to find the Ringtone in your Windows Phone. You have to follow certain steps to add your custom ringtone. Usually this option will not be available in Windows phone where you can select any MP3 song as “Set as Ringtone”. We will show you how to add a MP3 file as a custom MP3 ringtone in Windows Phones.
