You can use either of below options to change your number type:
Cancel the existing number and get a different number type:
Login Online https://my.iplum.com
Cancel your existing iPlum subscription online. Accounts >> Actions >> Cancel. Select immediate cancellation. For purchases made at iPlum portal it will cancel out immediately. If the subscription was purchased at Apple iTunes or Google Play, it will cancel at end of the current term.
Get a new subscription of your choice by clicking Dashboard >> Get Number.
Open a sub-account & let the first account expire:
Click “Multiple Account” to add a new account with in your primary account. You can use an “Email” as login ID or a different phone number. Complete the registration process for the add-on account login.
Login as Primary Account if you have logged out.
Get a new number subscription for this sub-account by clicking Get Number >> Account.
Login iPlum App on your phone using the new Login ID.