I wish IB would just allow me to use the more mainstream 2FA apps like Google Authenticator and Authy. They're perfectly secure and widely used.
Giving credit where credit is due. IB's notification system has been rock solid for me for about three weeks.
I also prefer to use Google Authenticator, I may already accustomed to this technology. In addition, there have already been cases when you had to Transfer Google Authenticator due to the loss of an old device. By the way, Transfer Google Authenticator to New iPhone is a process in which preparation is the most important part. By the way, it is useful to read How to protect yourself in case the iPhone crashes https://www.protectimus.com/blog/how-to-transfer-google-authenticator-to-new-iphone/ if you use this technology. In short, you need to backup the google authenticator key. It is quite simple and does not need to resort to anyone's help)