To know about the steps to deal with the Gmail error code then you need to start by removing the Gmail account and then setting it up again. If you are able to log in on your Gmail account without any issues then you need to verify that your device is not being blocked in device activity and notification so you have done the CAPTCHA reset and ensure that IMAP is enabled. For this, you need to try the modern version by unplugging and plugging it back. Lastly, you need to remove your Gmail account from your iPhone and then set it up. These are the steps that users need to follow to deal with Gmail error code issues.