Thales has successfully demonstrated a remote post-quantum security upgrade for 5G SIM cards, enabling telecom operators to enhance network security without requiring device replacement or service interruption. This approach leverages crypto agility, allowing for over-the-air encryption upgrades as standards and threats evolve. The demonstration is a significant milestone, building on Thales' research and contributions to post-quantum standardization efforts, including those led by the National Institute of Standards and Technology (NIST). By utilizing post-quantum cryptography, Thales aims to protect 5G networks from potential quantum computing threats, which could otherwise compromise current encryption methods. The ability to remotely deploy post-quantum cryptography on SIM and eSIM cards ensures a seamless transition to quantum-resistant encryption, mitigating the risk of service disruption. This development is particularly significant given the looming threat of quantum computing, which has the potential to break current cryptographic standards1. As a result, the urgency to plan and implement post-quantum cryptography (PQC) migrations has increased, making Thales' demonstration a crucial step towards securing 5G networks against future quantum threats. So what matters to practitioners is that they must now prioritize PQC planning to stay ahead of the evolving quantum threat landscape.