I trimmed some ringtones for a few contacts, but sometimes the ringtones just change to some other music by itself (music from my music player) and it happend a few times already. And I didn't find a pattern of why and when it will change by itself. It didn't change to the default ringtone, it just change to some random music, and it happened to my Alarm ringtone also. Any idea what's wrong? Thanks in advance.