Smartphone is required for everything there, yes. Signing up for services, authenticating yourself (e.g. when entering a train station), payment, social media, etc.
Computers used to be expensive and people had less money back then, so most of the country essentially just directly upgraded to smartphones. Many don't and never used to own a PC outside of work.
Computers used to be expensive and people had less money back then, so most of the country essentially just directly upgraded to smartphones. Many don't and never used to own a PC outside of work.