Step by step process to change your iPlum phone number:
Login: Go to the web page https://my.iplum.com on your computer or a tablet.
Dashboard >> Utilities >> Change Number.
Select the Account for which you want to change the number. Choose the new iPlum number in subsequent screens. There is a small one-time fees to change the number. Once completed you will have a new iPlum number. If you don’t see the new number immediately reflected in the iPlum app, simply logout of the app & log back in. Logout is available in iPlum App Settings.