If you are unable to complete SMS authentication, you can skip it and proceed.
Please see below.

[If you do not receive the code]
Please click the "Resend code" button and try again.

[If you are unable to complete SMS authentication]
After entering your mobile phone number, click the "Send authentication code" button, then click the "Click here if you are unable to complete SMS authentication" button that appears to allow you to skip SMS authentication and proceed to the next step.