IP Multimedia Subsystem (IMS) is about to revolutionize the telecom market. According to ABI Research analyst Ian Cox, "Every Tier 1 service provider in fixed and wireless networks will announce SIP-based services running over IMS in the next six to twelve months." IMS began life as a wireless network architecture for adding IP-based services to existing circuit-switched voice. When Session Initiated Protocol (SIP) was introduced, IMS evolved to an open architecture: operators are not locked into a proprietary solution, nor are point solutions needed for each service. Soon fixed network providers began adapting it to IP networks. IMS allows a single device to use both fixed and wireless networks. IMS will allow many new services, including VoIP, to be offered simultaneously over SIP-enabled networks. Vendors can develop applications and equipment knowing they will be fully interoperable. Services can be tried quickly and discarded if unpopular. A single database holds all subscriber information, lowering operating costs for multiple services.
As international travel rebounds to pre-pandemic levels in 2025, the mobile communication roaming market is at an inflection point. Emerging technologies and changing customer preferences are challenging traditional wholesale roaming agreements between mobile network operators (MNOs). The global wholesale roaming market is projected to more than double, from $9 billion in 2024 to $20 billion by 2028. This surge will be fueled by the expanding deployment of 5G Standalone (SA) technology, which enables real-time roaming connections and activity monitoring. But beneath this headline figure lies a complex landscape of regional variations and technological mobile service disruptions. Global Mobile Roaming Market Development Western Europe dominates inbound roaming connections, largely thanks to its Roam Like at Home (RLAH) initiative, which eliminates roaming charges among member countries. Meanwhile, the Indian Subcontinent is emerging as a growth hotspot. Between 2024 and 2029, inbou...