How long does an IoT SIM last in the field?
Short answer
A well-chosen industrial IoT SIM lasts 10-15 years in the field. Key variables: form factor (MFF2 > plastic), temperature range (-40 to +105 °C), write cycles (500 k minimum), and certification (GCF, eUICC). Add connectivity contract life, which can be 5-10 years or 'lifetime' depending on the provider.
Why plastic SIMs fail first
Plastic SIMs shake loose in the socket with vibration, contacts oxidize with humidity, and the plastic degrades at high temps. In a 10-year buried meter or a truck tracker, the SIM usually fails before the device.
What to spec for 10+ years
Soldered MFF2, industrial certification (-40/+105 °C), 500 k+ write cycles, humidity-resistant packaging (IP67 if outdoor), and a connectivity plan with guaranteed lifetime. Cheap turns expensive the moment you roll a truck.
Lifetime SIM plans
Some providers offer 10-year prepaid at €30-80 that covers connectivity up to a data cap. Common for residential gas sensors, in-car eCall, and medical devices sold to consumers.
- Soldered MFF2 for longevity
- -40 to +105 °C
- Lifetime plan to avoid renewals
- IP67 if outdoor
12-point checklist for long-life SIMs
Download the checklist we use with industrial clients before they buy 10,000 SIMs. Saves three years of headaches.
Frequently asked questions
Does the SIM 'wear out' from heavy network use?+
No. What wears is the internal flash memory (counters, rotating keys). 500 k cycles is plenty for 15 years of normal use.
Can I reuse an old phone SIM?+
Bad idea. It doesn't meet industrial temperature range, lacks enough cycles for IoT, and the plastic degrades. Fine for short pilots; wrong for production.
What happens when 2G/3G sunsets?+
If your SIM doesn't support 4G/5G/LTE-M/NB-IoT, you swap the device. That's why buying multi-tech modems and compatible SIMs today is right, even if you deploy on 2G now.
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