Thazeiyien19 This has nothing to do with data collection, IF Swisscom wants to collect the data, they don't need the 2-Factor authentification. It is indeed for the clients security. How data are collected exactly is not communicated to us clients.
Btw, you can also select the 2-FA only for sensible data, not for TV, E-Mail, even MySwisscom itself. Here:
Manage Login - My Swisscom
by chosing the second option:
