A Jabber ID is an account identifier similar to an email address. It is what you will log into your Jabber client with and how you will send and receive text messages with your new phone number. You can use a Jabber ID from any standards-compliant service with JMP.
Get one from ChatterboxTownor contact support to get set up with a Snikket instance on your own domain or subdomain. Highly recommended for iOS users. Android users can skip this step and just get the app below.
Any standards-compliant Jabber app on any platform will work.