u‑blox Launches MQTT Flex: Bring Your Own SIM for Scalable, Low‑Power IoT Connectivity

u‑blox introduces MQTT Flex, a flexible “Bring Your Own SIM” solution that brings any cellular network into a low‑power, scalable MQTT ecosystem.

MQTT Flex sits on a high‑performance MQTT broker and a robust Data Flow Manager, streamlining bidirectional data exchange between your sensors and enterprise systems. Designed for asset tracking, sensor networks, and monitoring workloads that demand minimal bandwidth and extended battery life, the service delivers predictable, on‑demand scalability.

With u‑blox’s MQTT Anywhere and IoT SIM cards, developers already enjoy global roaming across 2G, 3G, and LTE networks. MQTT Flex expands this reach by allowing existing cellular connections to tap into u‑blox’s Communication‑as‑a‑Service without changing mobile network operators.

Our Bring Your Own SIM strategy removes the operational and logistical hurdles of switching carriers while meeting regulatory requirements that may mandate local network operators. In regions such as Turkey, Brazil, and Australia—where permanent roaming is prohibited—MQTT Flex maintains home‑network connectivity and still offers global MQTT coverage.

MQTT Flex also unlocks MQTT‑SN over NB‑IoT in markets lacking roaming agreements for this low‑power, low‑data‑rate technology. NB‑IoT’s extended coverage is ideal for devices buried deep in buildings, underground, or within utility meters.

All MQTT Flex services are managed through the Thingstream IoT platform—a self‑serve interface that gives you full control over device fleets, billing, event monitoring, and API integration.

Learn more about MQTT Flex at u‑blox.