近日，通信行业迎来历史性突破——中国电信与中国联通在山东成功打通业界首个跨运营商可溯源 VoWiFi 通话，为解决蜂窝网络室内弱覆盖导致的语音、短信难 题提供跨运营商方案。 即使双方使用不同运营商（如电信用户呼叫联通用户），在 WiFi 环境下也能显示真实号码拨号，通话计入套餐时长，并支持精准溯源保障安全。 早在2022年5月20日，上海电信就成功打通了全球第一个具备端到端带溯源能力的 VoWiFi 电话。 看到这里，可能一些小伙伴对 VoWiFi 比较迷茫，也有人会将其与 VoLTE 和 VoNR 混淆。 VoLTE (Voice over LTE)是一种基于 4G 网络的语音通信技术，它允许语音服务直接通过 4G 网络传输，而不需要回落到 3G 或 2G 网络。 VoNR（Voice over New Radio）则可以看作是 VoLTE 在 5G 时代的升级版，它利用 5G 网络来承载语音服务。相较于 VoLTE，VoNR 在通话质量、接通速度和视频 分辨率等方面都有显著提升。此外，VoNR 在通话过程中不会中断数据连接，确保了语音和数据业务的同时进行。比如玩游戏、观看视频或进行其他需要网络连 接的活动 ...

Group 1 - The article discusses the evolution and significance of dual SIM card functionality in mobile phones, highlighting its origins and the role of Chinese manufacturers in popularizing this feature globally [1][3][5] - The introduction of low-cost chip solutions by companies like MediaTek significantly reduced manufacturing costs, enabling the rapid proliferation of dual SIM phones [3][6] - The demand for dual SIM functionality in China is driven by factors such as varying telecom package costs, the need for separating work and personal numbers, and differences in network coverage among operators [8][10] Group 2 - The article explains the technical aspects of dual SIM technology, including the two main modes: DSDS (Dual SIM Dual Standby) and DSDA (Dual SIM Dual Active), detailing their operational differences [15][17][19] - DSDS allows both SIM cards to be on standby but only one can be active for calls or data at a time, while DSDA enables simultaneous use of both cards for calls and data [19][21] - The advancements in VoLTE and VoNR technologies have enhanced the quality of voice and video calls over 4G and 5G networks, respectively, improving the dual SIM user experience [23][25] Group 3 - The evolution of SIM card sizes from Mini-SIM to Nano-SIM has facilitated the physical implementation of dual SIM functionality in smartphones [29][30] - The design of SIM card slots has transitioned from fixed internal slots to more user-friendly removable trays, allowing for better space management within devices [30][33] - The emergence of eSIM technology represents a significant shift, eliminating the need for physical SIM slots and enhancing device waterproofing and user convenience [37][40][41]

Core Insights - The mobile core network (MCN) market experienced a year-on-year growth of 19% in Q2, with the 5G segment growing by 31% and the voice core segment by 18% [2] - The growth of 5G standalone (5G SA) networks is driven by an increase in the number of users and mobile network operators (MNOs) launching more 5G SA services, with 71 MNOs confirmed to have launched 5G SA services for consumers [2][5] - The adoption of new technologies such as NR RedCap and dynamic network slicing is expected to enhance the performance and reduce costs for IoT devices connected to 5G networks [2][8] Market Growth and Projections - The growth rate for the MCN market is projected to double to 10% by 2025 due to strong performance in the first two quarters of the year [2] - Despite only 10% of MNOs having launched 5G SA, the core space is accelerating due to the low penetration rate of 5G SA users, with only 14% of mobile users expected to have 5G SA services by the end of 2024 [5] - The revenue for 5G MCN is expected to grow at a compound annual growth rate (CAGR) of 6% from 2024 to 2029 [7] Technological Advancements - The introduction of NR RedCap is anticipated to lower costs and improve performance for IoT devices, with new 5G smartwatches expected to launch soon [8] - Multi-access edge computing (MEC) is also seeing significant growth, with a 32% year-on-year increase in Q2 2025 and an expected 44% growth for the year [11] - The integration of new voice technologies such as VoNR with cloud-native IMS Core is enhancing user experience and driving growth in voice core and 5G packet core markets [9] Industry Trends - MNOs are increasingly recognizing the potential of cloud-native networks, leading to upgrades in voice core systems, which is contributing to market growth [2][9] - The trend of migrating 5G core workloads to public cloud options is re-emerging, allowing MNOs to evaluate the best solutions for their markets [10] - The use of artificial intelligence in network operations is expected to drive demand for more core capacity as MNOs offer advanced AI tools to customers [9][10]