If all those steps fail, a reboot may be in order. If you have tried Airplane Mode, deleted the voicemail message, and cleared old messages, this is the next task. Try a simple reboot to see how it goes.
Hello! Thanks for calling [LinkedPhone’s Customer Success Team]. We are currently helping other customers achieve their goals and want to do the same for you! Please leave a message with your name, number, and a brief description of how we can serve you. We promise to return your call [before close of business today]. In the interim, you can also check out our website at [linkedphone.com] for helpful answers to our most common requests. Thank you.

Open the file you want to store.Tap Select, the file name and then Organize, which looks like a little folder.Under “On My [Device name],” choose a folder or tap the icon of a folder with a plus sign to create a new one.Tap Copy and you’re done.
For information about how to update your outgoing message, forward your desk phone to a cell phone, and check voicemails remotely, reference this Knowledge Base article from the EOU IT Department: https://kb.eou.edu/topic/phone