I need to buy a better phone but have google authenticator on the old one. I use GA to access coinbase and bittrex.
Should I transfer GA before I get rid of the old phone? If so, how do I do this transfer?
BTW I really hate having to use GA because of such doubts, is there an alternative way to access bittrex and coinbase?
The only way to backup your 2fa code/s is to save their corresponding recovery/secret code or Qr code which can be seen when you first activated your 2fa.
These backup's can be used to import your 2fa code/s into another device or another auth app (
Each 2fa code has a corresponding backup code)
Now if you don't have it, it'll be a case by case basis since each site has a different ways of handling this kind of problems.
For instance in coinbase, Since you can still access to your 2fa, you should be able to login without any problems and follow the steps below
ProblemI want to move my 2FA codes to a new device and still have the old device
SolutionLog in to Coinbase using your username/password and a 2FA code from your old device
Go to your Security Settings page:
https://www.coinbase.com/settings/security_settingsRegenerate your secret key
Note: Regenerating your secret key will invalidate your old device tokens. Write down the new secret seed and keep it in a safe place (we recommend storing it offline on a piece of paper, USB key, or other medium you can keep secret and safe.
Scan the new secret with your new Authenticator device
As for bittrex, Refer to this:
https://support.bittrex.com/hc/en-us/articles/115000198612-Troubleshooting-Two-Factor-Authentication-2FA-