Just to be sure, did you check to see that the profile you're using hasn't changed? There are separate settings for "Out of the Holster" and "In Holster." Also check that the "Volume" setting for the profile isn't set to "Mute," which you might not notice if you're using "Vibrate+Tone." I know this sounds basic, but it's easy to overlook a wrong setting, especially when you're struggling to find an answer to a frustrating problem. Try selecting different ringtones, in case the one you're using is somehow corrupted.
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