Core Insights - The article discusses the upgrade of Beidou SMS services by China Mobile in collaboration with China StarNet, aimed at ensuring uninterrupted communication during the Spring Festival travel season [1][3]. Group 1: Service Overview - Since 2019, China Mobile has integrated Beidou satellite communication capabilities into smartphones, planning to offer Beidou SMS services to the public in 2024, with nearly 200 million users already developed [3]. - The service allows users to send Beidou SMS without needing to change their SIM card or phone number, functioning in areas without ground network coverage [3]. Group 2: Emergency Communication - China Mobile provides emergency communication support for over 320,000 users across seven provinces, particularly during natural disasters like floods and earthquakes expected in 2025 [3]. - The Beidou SMS service is designed to be a reliable lifeline for outdoor enthusiasts, enabling them to send location-based distress signals through a map app in collaboration with Amap [4]. Group 3: Enhanced Features - The upgraded Beidou SMS service now supports sending 40 Chinese characters and receiving 10 characters, along with the capability to send images and voice messages after phone upgrades [4]. - This feature allows users to share scenic photos or send voice messages during emergencies, enhancing communication clarity and safety [4]. Group 4: Supported Devices - As of February 5, 2026, there are 57 smartphone models supporting Beidou SMS, including 42 models from Huawei, 8 from Honor, 3 from Vivo, 3 from Xiaomi, and 1 from OPPO [5][6][7].