This is a general question about selling our modem-enhanced products internationally.
We use an NRF9160 (NB-IoT), but we have some of our devices equipped with older Telit modems (LTE-M).
We have inquiries from global companies and they need to know if our products will work in their area of the world, but we do not know what to say, as we cannot test them.
We also cannot find out if their carriers will work with our modems (as far as we know).
Currently, we send modems with SIM cards included, and tested in production, rather than asking our customers to provide their own. This way, the device is known to work.
We do send some devices internationally, but only if we can confirm our in-built sim cards will work in their areas and with their carriers.
How can we know, ahead of time, that our products are safe to ship to other areas of the world, and that they will work?
I know Nordic provided this simple compatibility matrix, but we are unsure how to really apply the knowledge, and it seems thin to determine international compatibility.
Thank you for any insight.