Hello,
I’m surprised Swisscom only offers SMS as 2FA. Not only they don’t give an alternative, but in the help site they say the following:
For security reasons?! Okay, that is terrible. SMS as 2FA is known to be the weakest form of 2FA. It offers almost no additional protection compared to not having 2FA in the first place.
Why not add, like many other providers and websites, support for hardware tokens and HOTP/TOTP?