It work even if I used my PC still ask for a 2FA google authenticator. However, I am only picking some website that should be used with 2FA google authenticator for it will be annoying also if it will be applied to all websites.
If you think that you're doing something serious on that site then you can enable the 2FA, it isn't necessary to use this from everything. Just choose a site that seems substantial such in trading sites that we mostly use and sometimes leave our coins for a while.
Don't forget to backup secret key because it's very important when you lose your device. Make sure it's well written on the piece of paper or make a backup copy in your USB device or PC.
I just want you to add this method because the android google authenticator doesn't have a backup feature unlike in laptop/PC.
I just know this. Thanks.