Another worth considering trick is to remove all the old voicemails that are consuming the storage and creating multiple dilemmas like this. To delete the voicemail here are the steps, Open the Phone app. Tap on Voicemail at the bottom tab. Then tap on Edit at the top-right screen. Select All the Voicemails and at last tap Delete.
Access to voicemail can also be obtained through the iPhone’s dial pad by pressing and holding down the 1 key until your phone calls your 10-digit phone number, or by pressing the voicemail icon, which can be found in the bottom right corner of the dial pad screen, as shown in the image below.

Now, it’s the time for a tutorial on how to change voicemail greeting on Android. Basically, there are two methods to get it done, depending on your system operation. If you’re using Android Marshmallow, here’s what you need to do:
AT&T and other wireless service carriers have revealed a series of preventative measures to help maintain phone service as Hurricane Florence approaches the mid-Atlantic region, including the use of wireless “flying COW” (short for “cells on wheels and wings”) drones that can maintain connectivity for up to 40 square miles once they are activated.