What is my username for the JB Hi-Fi Mobile app? Your username is the email address given at time of activation of your service, if you currently have the My Telstra App, your username is the same as your Telstra ID used to access the My Telstra App. Download the JB Hi-Fi Mobile app Related articles What can I do in the JB Hi-Fi Mobile app? How do I change my JB Hi-Fi Mobile account details? How do I reset my JB Hi-Fi Mobile password? I can’t see my plan in the JB Hi-Fi Mobile app How do I get my PIN or PUK code?