https://www.dotnetzone.gr:443/cs/blogs/dt008/archive/2011/10/11/creating-a-ringtone-in-windows-phone-7-5-mango.aspxSo, you just updated your beautiful Windows Phone device with Mango and you want to create a custom ringtone. Well, you can use any music file you want, if it fits the following requirements 39 seconds or shorter smaller than 1 megabyte (MB) saved inelCommunityServer 2.1 SP3 (Build: 20423.1)