Still I'm using google 2fa authentication without any problems. It is very important to save 16 digit code on a paper. Cause if we lost it then I think there have no way to reset account.
That's wright! Why nobody told me that at the beginning? Btw anybody know how to recover that code if you didn't wrote it?
There's no recovery with Google Authenticator without the QR code or characters of the 2fa seed (Authy app has backup option though). If Authenticator is used for a site like an exchange, and you still have working 2fa, you can go in and disable & re-enable 2fa to get a new 2fa seed, which you can then save.