Fibocom has launched the RU311, a new 5G RedCap module series that tackles a persistent problem in IoT: how to bring existing 4G products onto 5G networks without forcing a full redesign. The module, built on UNISOC's V527 platform, supports dual-mode 5G RedCap and LTE Cat.4, offering peak downlink speeds of up to 226 Mbps and uplink speeds of 120 Mbps in RedCap mode — a step up from LTE Cat.4's 150 Mbps down and 50 Mbps up, but well below the gigabit speeds promised by full 5G.
The announcement, covered by The Fast Mode, arrives as IoT device makers weigh the cost and complexity of upgrading millions of deployed 4G products. For context on how connectivity shapes the broader device market, see our IoT coverage.
Why RedCap, Not Full 5G
Not every IoT use case needs the raw throughput of a smartphone-class 5G connection. Industrial gateways rarely stream 4K video. Security cameras transmit compressed frames intermittently. Energy meters send small packets of usage data a few times a day. Aftermarket automotive telematics need reliable low-latency links, not multi-gigabit pipes.
5G RedCap fills the gap. Standardized as part of 3GPP Release 17, RedCap (short for "reduced capability") is a simplified version of 5G that trades peak speed for lower cost, reduced power consumption, and smaller silicon footprint. Where full 5G modules can cost hundreds of dollars and draw substantially more power, RedCap modules typically sit at a fraction of the price and power budget — enough throughput for most IoT applications without the overhead.
This is the core trade-off behind RedCap's design. A full 5G New Radio (NR) module supports wide channel bandwidths, massive MIMO, and carrier aggregation across multiple bands. RedCap modules typically operate on narrower bandwidths (up to 20 MHz downlink, 15 MHz uplink), use simpler antenna configurations, and drop carrier aggregation. The result is a chip that is 30 to 50 percent smaller in die area, consumes less power, and costs less to produce.
According to analysts at IoT Business News, "the value of RedCap will depend not only on what the radio technology can do, but also on how easily it can be introduced into products that are already designed, validated, and deployed." IoT Business News notes that Fibocom's approach stands out for its attention to the practical engineering challenges of migration, not just the headline radio specifications.
Inside the RU311 Module
The RU311 is built on the UNISOC V527 system-on-chip, a mid-range 5G platform that balances performance and power. UNISOC, headquartered in Shanghai, competes in the IoT chipset market alongside Qualcomm and MediaTek, with a particular focus on cost-sensitive cellular IoT segments.
The module ships in three form factors to match different product development stages. The LGA (Land Grid Array) variant measures just 32 mm by 29 mm by 2.4 mm, making it suitable for compact embedded designs. The M.2 variant targets rapid validation and platform integration, while the Mini PCIe form factor fits into industrial gateways, routers, and embedded PCs that follow the older expansion standard.
Crucially, the pin layout is designed for backward compatibility. Fibocom states that the RU311's LGA variant shares a pin configuration with the company's FG132 RedCap module and its NL668 and L716 LTE Cat.4 modules. For device manufacturers with existing 4G-based products, this means a new modem can sometimes be dropped in without redesigning the entire motherboard.
That compatibility matters in a sector where product cycles stretch across years. A smart meter deployed today may still be collecting data five years from now. An industrial gateway installed in a factory may have a seven-year service life. Retrofitting a cellular module in the middle of that lifecycle typically requires motherboard changes, new antenna tuning, updated RF shielding, and full re-certification with carriers — a process that can take months and cost tens of thousands of dollars.
The RU311 supports a set of protocols common across IoT deployments: TCP, UDP, HTTP/HTTPS, SSL/TLS, and MQTT. Physical interfaces include USB 2.0, UART, RGMII, SDIO, I2C, SPI, and GPIO. These cover the connectivity needs of most embedded applications, from industrial telemetry to fleet tracking.
Migration-Friendly Design for Existing Products
Changing cellular generations rarely means swapping a single chip. A new module often demands motherboard modifications, interface adaptation, testing, and a fresh product introduction cycle. For an OEM with an existing Cat.4 product already in production, those changes can delay a 5G upgrade by months and add substantial cost.
Fibocom's answer is to treat RedCap as an incremental evolution rather than a hard cutover. The pin-compatible design lets manufacturers introduce 5G RedCap into existing Cat.4 platforms with reduced engineering effort. Companies developing new boards from scratch can use the LGA variant, while those working with modular industrial platforms can evaluate M.2 or Mini PCIe options without committing to a single integration path.
The data rates reflect the mid-tier positioning. At 226 Mbps downlink and 120 Mbps uplink in RedCap mode, the RU311 exceeds the throughput of LTE Cat.4 (150 down, 50 up) while staying well below full 5G NR. Those speeds support a range of applications: high-resolution sensor data streaming, real-time video uplink from security cameras, fleet telematics with location and diagnostic data, and remote control of industrial equipment.
What the RU311 does not target is consumer smartphone-like performance. The module is aimed squarely at devices that transmit data in small bursts, operate on battery or solar power for extended periods, and need to survive in harsh environments. A highway toll reader, a smart parking meter, an agricultural sensor node, or a containerized energy storage system — these are the use cases where RedCap's balance of speed and efficiency matters more than raw throughput.
Broader IoT Connectivity Trends
The Fibocom launch fits a wider pattern in the cellular IoT market. Carriers and module vendors have been rolling out low-to-mid-tier 5G offerings over the past two years, recognizing that the bulk of the IoT value chain does not need multi-gigabit speeds. RedCat, Quectel, and Sierra Wireless have all introduced their own RedCap modules, each targeting slightly different segments of the industrial and enterprise market. The technology was first standardized as part of 3GPP Release 17 in 2022, with commercial rollouts beginning in 2024 and picking up momentum through 2025 and 2026. ABI Research forecasts that RedCap module shipments will reach 185 million units annually by 2028, driven by smart city sensors, industrial automation, and connected healthcare equipment.
Carrier support has been expanding in parallel. Verizon, AT&T, and Deutsche Telekom all confirmed RedCap network availability across their 5G footprints by mid-2026, while Chinese operators — leveraging UNISOC and other domestic chipset providers — moved earlier, with commercial RedCap services live since late 2025. That carrier backing gives module makers like Fibocom room to compete against Qualcomm's Snapdragon X series and MediaTek's offerings on price, not just performance.
TelecomLead's analysis notes that the RU311 announcement came alongside news of Deutsche Telekom's €30 billion fiber, 5G, cloud, and AI strategy, as well as investment activity in tower infrastructure from La Caisse and Elsight's cellular-satellite hybrid platform. TelecomLead frames the moment as one where connectivity infrastructure — from towers to satellites to edge compute — is converging around a tiered set of performance and cost profiles.
The timing also reflects pressure from the supply chain. Semiconductor foundries are scaling back production of older 4G-centric chips, while demand for 5G-capable modules continues to grow in industrial markets. UNISOC's V527 platform, which powers the RU311, represents a homegrown alternative to Qualcomm's Snapdragon X series and MediaTek's offerings, with pricing that appeals to cost-conscious device makers in markets where a $50 per-module premium for a full 5G chipset can erase the business case for an upgrade.
Looking ahead, the next wave of IoT connectivity will likely be defined not by peak speed records, but by how well existing devices can step forward into 5G. As one analyst observed, the transition from 4G to 5G in IoT is less about a technology switch and more about a gradual widening of the connectivity envelope — more bandwidth, more reliability, and more features, without abandoning the millions of devices already deployed. Fibocom's RU311 positions itself at that intersection: a practical path for products that cannot afford to be left behind.