The 25 most asked questions about IoT
Clear, no-fluff answers written by engineers who deploy IoT SIMs every day. Pick your question and jump straight to what you need.
Fundamentals
What is IoT (Internet of Things)?
Read answerIoT SIM
What is an IoT SIM card?
Read answerFundamentals
How does IoT work?
Read answerFundamentals
What is M2M (Machine to Machine)?
Read answerComparisons
What is the difference between M2M and IoT?
Read answereSIM
What is eSIM and why does it matter in IoT?
Read answerNetworks
What is NB-IoT (Narrowband IoT)?
Read answerNetworks
What is LTE-M (Cat-M1)?
Read answerComparisons
LoRaWAN vs cellular: which connects your IoT better?
Read answerPricing
How much does an IoT SIM cost in 2026?
Read answerSecurity
What is a private APN?
Read answerHardware
How long does an IoT SIM last in the field?
Read answerNetworks
IoT connectivity: how to choose in 2026
Read answerData
How many IoT devices exist in the world in 2026?
Read answerRoaming
IoT roaming: how it works and where it gets tricky
Read answerSecurity
Do you need an IoT SIM with fixed IP?
Read answerSecurity
IoT security: 10 must-have controls
Read answerProtocols
What is MQTT?
Read answerProtocols
Which IoT protocol to choose
Read answer5G
5G and IoT: what actually matters
Read answerIndustry
What is Industry 4.0?
Read answerIndustry
Predictive maintenance with IoT
Read answerMetering
Smart metering: industrial telemetry with IoT
Read answerHardware
What is an IoT gateway?
Read answerIndustry
What is a digital twin?
Read answerMulti-carrier connectivity
Multi-network IoT SIM: coverage on Telefónica, Vodafone, Orange, MásMóvil and 750+ global networks
Read answerM2M Spain
M2M SIM for devices in Spain
Read answerDedicated static IP
IoT SIM with static IP (4G/5G)
Read answerPrivate APN
Private APN for IoT SIMs
Read answerGlobal roaming
IoT SIM with global, permanent roaming
Read answerGPS tracker
IoT SIM for GPS trackers
Read answerAlarms & ARC
IoT SIM for alarms and Alarm Receiving Centers
Read answerSmart metering
IoT SIM for smart meters
Read answerEV chargers
IoT SIM for EV charging points
Read answer