Brainstorming Let's talk about the time you had troubles using an electronic device. Q1) What device and why were you using? A1) I have been using my smartphone for paying a bus fare. Galaxy smartphone has a NFC feature. And I can pay a bus fare using the NFC feature. Q2) What was the problem? A2) I had to register my credit card on my smartphone in order to use my smartphone for paying a bus fa..