@MagdalenaPo,
Thank you for your reply!
Although in the international specs page, it states that both device support SA, but this notation is not appearing in UK's specs page. It is known that hardware is different when devices in the same name is sold in different countries, one good example may be that UK version do not support mmWave and have two nano sim card slots, while the US version has mmWave and can only hold one physical sim.
Would you mind confirm with the developers that this is enabled for UK version of fold 4 (unlocked)? As last time when I travel back home my fold 3 (UK, unlocked) could not connect to th SA network all the time while the same sim card could connect to that network using multiple devices at Band N78.
Thank you in advance!