2 factor authentication for gmail (email) ?

[stuartup57]

I recently noticed that Google has enabled a 2 factor authentication to help save your email account from getting hacked... may be it is implemented from long, but i just noticed today...

1. Does anyone here use 2 factor for your email ?

2. What happens if you loose your phone.. How do you sign in from your laptop? Is there a way to reset the 2 factor authentication to another phone later?

3. How will you sign in if your phone is notaround ?

4. How will that work on your phone app for gmail ? Will you need to use 2 factor everytime to see your new emails ?