To remain active each month, do SIM cards have do anything?

Once activated and registered on the network at least once, do SIM cards have do anything each month to remain active? I have customers who turn of their devices for months at a time, so this would be a big problem for me…

Leave it on. There will be a minimum charge ($ pennies) to maintain your SIM card active.
I had been using Hologram SIM cards for almost 2 years now, no data sent then no charge.


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Great, thank you, that confirms what I’ve seen.

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