Talk:All countries/@comment-91.152.195.161-20170722072752/@comment-91.152.195.161-20170727170140

M2M SIM cards explained shortly here :

https://dzone.com/articles/what-is-an-m2m-sim-card

https://dzone.com/articles/steered-vs-non-steered-multi-network-roaming-sim-cards?fromrel=true

The best card is clearly specify all supported operators and can connect to any 2G,3G,4G type of network.

But not so much companies sell small amount of cards to private persons.