My question is if I don't use the Steam mobile authentication from the Steam app will I have to wait 3 days each trade I make or will this happen only a set amount of times? (Would much prefer they had the 2FA done by SMS or something that doesn't relies on the app, because of the nuisance it creates each time I log into Steam)
This is because I have Steam trading cards I want to trade, and I want to know if this wait time will apply each time I trade with someone.