IoT Deployments and Carrier Networking

Hello Folks,

I wanted to pick your brains on IoT deployments.

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We have IoT devices running out in the wild with over 200k devices and counting. A major chunk of this is with cellular carrier "A". Today all these devices are in a private APN, so these are not addressable over the internet. Security by obscurity. We also have a smaller set of old devices with another carrier "B" that is on the internet, much like your phones etc.

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With us expanding as a company and also going international, the carrier A option does not scale too well. The business is also working on going multi-carrier to save on cost.

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I am interested in learning what others in this field are doing. Our current thoughts are to go with internet connected sims. This leaves the devices open to attacks, but that is something we will need to work on.

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Thanks