Apple has released iOS 8.1.2 which brings a fix where an issue that could cause ringtones to be removed from your device.

If you are jailbroken or thinking of jailbreaking stay away from this update until any of the jailbreak Devs confirm whether or not it has patched the jailbreaks.

To restore any ringtones lost simply visit itunes.com/restore-tones from your iOS device.

For information on the security content of this update, please visit this website:
http://support.apple.com/kb/HT1222