iPlum is a business app. It is your dedicated mobile virtual number attached to the iPlum app which means you can logout from one device & login into another device and use same iPlum number.
iPlum is built to send & receive short codes for verification etc. You should be able to activate various apps using iPlum but there are some app vendors which may require you to input your physical device phone number to verify accounts for security reasons. Please check with them.