iot.cards blog
Short notes from the technical and product teams: 2G/3G network sunsets country by country, new permanent-roaming regulations, LPWA technology launches, lessons from real deployments. The blog publishes irregularly — only when there's something worth saying.
Published posts
LTE-M vs NB-IoT: a technical guide to choosing
Latency, power, mobility, voice, coverage, and a practical decision tree.
Multi-IMSI explained: switching carrier without touching the SIM
How it works, differences vs. eSIM/eUICC, and real limitations.
SGP.32: the IoT eSIM that finally drops SM-SR
IPA/eIM architecture and why it changes profile management in UI-less devices.
Permanent roaming in IoT: what is allowed and what is not
Regulation country by country: Brazil, Türkiye, India, China, U.S. How to comply.
Private APN: when you need it and when it is overkill
Private APN vs public APN with VPN vs static IP. Decision tree with costs.
Hardware design with MFF2: PCB tips
Footprint, reflow, ESD and production testing of the solderable SIM.
What we cover
M2M/IoT news
Regulatory changes, carrier roadmaps, network shutdowns and what they mean for your project.
Market trends
eSIM adoption in M2M, NB-IoT vs LTE-M growth, global roaming pricing.
Field lessons
What works, what breaks, and what we wished we'd known when starting a deployment.
Security and architecture
Private APN, IPsec VPN, IMEI-based isolation, anomalous-consumption monitoring.
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