Is it possible to set a duration limit for voicemails?
Is it possible to set a duration limit for voicemails?
iPhone 4S, iOS 7.0.4, voicemail messages
Any such limit would be set by your carrier. Your voicemail is a carrier controlled feature. Visual voicemail just pulls the messages from your carrier. Call your carrier and ask them what options you can set or change on your voicemail.