For most users, it’s recommended to let your device automatically set the time. To make sure that your time zone and similar settings are correct:
Hi! So sorry it took me a few days to respond. I’m so sorry to hear what you’ve been going through. There are a few recorders that we mention in the post, but if those don’t work, try the service that Bonnie mentioned on the comments (http://www.voicemailsforever.com) or try contacting ATT and see if they have any ideas for you. One other option might be a portable speaker that so many stores have now, that you can use to listen to music on your cell phone or tablet. They really amplify sound. Let me know how things work out! Laura

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If your carrier supports the iPhone voicemail feature, you can retrieve and listen to your voicemail right from within the “Phone” app and call your contacts back by simply tapping their messages. That type of functionality is pretty neat and useful, because it saves you actual time. If not supported by your carrier, you will not be able to see the visual overview of your voicemail inbox and use any of the related features. Tapping the “Voicemail” tab in your “Phone” app will simply call the number associated with your voicemail box. So let’s get going with creating our custom voicemail greeting on iPhone! How to record your own Voicemail on iPhone Phone → Voicemail → Greeting → Custom → Record → Save