What internet speed is required to run PhoneBurner? Laura April 03, 2019 18:33 Updated Follow We recommend that you have 1Mb upload and 1 Mb Download speed minimum per user using your internet connection. Related articles Phoneburner Settings:General Troubleshooting softphone/microphone issues. SMS / Text messaging available (in Beta) What are allowed dailing times? How Do I Setup A Softphone? Comments 0 comments Please sign in to leave a comment.