CAT-M SIM connectivity designed for IoT devices that require mobility, more frequent data transmission and reliable performance. KeySIM supports CAT-M connectivity across EE, Vodafone and Three, with simple PAYG pricing for flexible IoT deployments.
CAT-M, also known as LTE-M, is a low power wide area technology designed for IoT devices that need efficient connectivity without sacrificing mobility or responsiveness. It operates on LTE infrastructure and supports applications that require more frequent communication than NB-IoT.
Compared with NB-IoT, CAT-M offers higher data rates, lower latency and support for mobile devices. While it does not provide the same speed or latency as standard LTE, it is specifically designed for IoT deployments where power efficiency and reliable communication are more important than raw performance.
A CAT-M SIM is best suited to deployments where devices:
If your deployment requires more flexibility and responsiveness than NB-IoT can provide, CAT-M is often the better choice.
CAT-M deployments typically require consistent communication, mobility and reliable performance.
Track the location and condition of assets that move between sites, depots or across the country — with regular position updates over LTE-M.
Fleet management, driver behaviour monitoring and vehicle diagnostics that require frequent data reporting and reliable mobile connectivity.
Portable alarm systems, lone worker devices and mobile CCTV that need dependable connectivity wherever they are deployed.
Patient monitoring devices, wearable health sensors and medical equipment that need to communicate reliably while in use or on the move.
Parcel tracking, cold chain monitoring and supply chain visibility across distribution networks where assets move frequently.
Connected equipment and machinery that requires frequent status updates, remote diagnostics or moves between operational locations.
KeySIM supports CAT-M connectivity across EE, Vodafone and Three, providing access to established UK LTE-based IoT coverage. CAT-M is well suited to deployments that require both reach and performance, particularly where devices move or communicate regularly.
Both are designed for low power IoT, but they suit different types of deployment. Understanding the difference helps you choose the right technology for each project.
CAT-M requires compatible hardware — devices must support LTE-M connectivity to use CAT-M SIMs. Many modern IoT modules and routers include CAT-M support, but it is important to confirm compatibility when selecting devices for your deployment.
If you need guidance on compatible hardware or are unsure whether your existing devices support CAT-M, our team can help you assess your options before committing to a deployment.
Our CAT-M SIM pricing is designed to remain simple and flexible. With PAYG pricing, you only pay for the data your devices use, without being locked into fixed bundles.
KeySIM provides CAT-M SIM connectivity for IoT deployments that require mobility, responsiveness and reliable performance.
With support across EE, Vodafone and Three, competitive PAYG pricing and experience supporting real-world IoT applications, we help customers choose the right connectivity for each use case.
EE, Vodafone and Three CAT-M support from a single SIM supplier.
Costs match actual usage — no fixed bundles or unused allowances.
Designed for devices that move — from single assets to large mobile fleets.
From small pilots to large-scale rollouts across complex deployments.
Not sure this is the right fit? See how our other SIM types compare.
Common questions about CAT-M connectivity and KeySIM's CAT-M SIM cards.
If your deployment requires mobile, responsive and efficient IoT connectivity, speak to KeySIM about CAT-M SIM options and pricing.