Here in Brazil, it becomes reasonably easy to use another mobile operator, keeping the same number (portability).

Now from what I understand, this article is aimed at in case you travel to another country, in which the data network and latency of another border. nostr:note1z6phmaeh64f68jv0c2n03md8npvevms4y5sarva7gjxy02tt9jfq26pux3