Network sunset
An operator switching off an older network such as 2G or 3G; devices that rely on it stop working.
Operators reuse spectrum for newer technologies, so 2G and 3G networks are being shut down in many countries, on different timetables.
Why it matters for business
Check sunset plans for every country and network you rely on. Choosing LTE-M, NB-IoT or 5G for new products avoids an early forced replacement.