This was a text message I received, supposedly from JB Hi-Fi saying I was a January winner of a gift. Inspection of the JB Hi-Fi webpage showed scams with the exact same wording, so sadly, I won't be winning an iPhone 11 or a Macbook. According to the website, there is some techno-trickery whereby the scammer can latch onto the JB Hi-Fi phone number to send out messages, so this may also be a legit JB Hi-Fi number.