An iPlum account holds one iPlum number. If you want multiple iPlum phone numbers, you can create separate iPlum accounts and use Call Forwarding feature in the iPlum app to send calls from other iPlum accounts to your primary iPlum phone number account. That way the calls from all the iPlum numbers will ring at one centralized iPlum app.
This process will also work if you want to port/transfer additional numbers into iPlum.
Please contact us to find the step by step process to setup multiple iPlum phone numbers.