Hey @KTP66, thank you for reaching out. We have an MMS guide that provides activation and troubleshooting instructions. We also have a specific step-by-step guide for the Pixel 4 XL. However, this guide should apply to the Pixel 5 as well. This involves activating the MMS APN (Access Point Name). If issues still persist, we welcome you to utilise our 24/7 Messaging Service via the My Optus App.
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