A small update to Skype today (version 5.10) adds two new features to the app, in the form of custom ringtones and a sort of in-app photo "forwarding" feature.

Custom ringtones can now be accessed by tapping in the lower-right area of a conversation and selecting "ringtone options," where you'll now find an entry to add a custom ringtone for a given contact. Skype should detect all of your phone's installed ringtones.

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