sir i have a account in nova exchange and i have changed my phone from ios to android and now when i am trying to login in nova exchange it is not accepting my android google authenticator code. please suggest me how can i login to my account.
How was this code generated? There's a new code every minute. Do you keep using the same code?
Contact their support and keep in mind you may need to get some verification sorted for them to reset your account.
If you do have the secret key then there may be other issues (such as the clock of the ios phone being out of sync).