Originally Posted by
paperwastage
while roaming, if its throttled on network side (think T-mobile USA and their free 2G 64kbit/s international roaming) - get a dualsim phone
if you are lucky and can use eSIM with iPhone (plus another physical sim), or buy the rare dualphysical-sim iPhones
2G doesn't work in some places, for instance Alaska and South Korea.
For years I had a USA phone (CDMA only, but small and lightweight) and an international phone (much heavier and somewhat larger, dual GSM and CDMA, but not a satellite phone) on a family plan that pooled minutes and data usage. One of the phones deliberately did not have a camera so that I could take it to places that prohibited cameras, such as some laboratories and factories. Now I keep a second more basic phone as a backup, but mostly use an iPhone wherever I am, and I'm thinking of dropping the second line and going for a new plan.