How can I delete a voicemail within the iPhone app? Brittany Thrasher February 07, 2018 21:30 Follow To delete a voicemail from the app, simply swipe the message to the Left and you will be given a red button to delete. Related articles Can I call back customer from a voicemail? How do I set up my phone with the Grasshopper iPhone app? FAQs for the Desktop App Comments 0 comments Article is closed for comments.