Enabling SMS 2FA consists of the following steps:
Visit your account Security settings and open the the “Two-Factor Authentication” drop-down menu, then select the "SETUP" button below Twilio:
Next, specify your phone number including the country code:
Click the "Send SMS Token" button to request the confirmation SMS.
You will receive an SMS on your mobile device containing a confirmation code. Enter this code into the text box labeled "SMS code" and click the "Confirm SMS Token" button.
If the correct code is entered, you will see the following confirmation notice:
You should then receive the following confirmation email shortly after:
Open the "ACTIVATE SMS 2FA NOW" link in the same browser as you are using to access your Bitfinex account. You will then receive a confirmation that SMS 2FA has been enabled successfully:
Finally, you will have SMS 2FA enabled for confirming withdrawals, requesting password resets, and for creating API keys. If any of these steps fail, or if you see any error notifications returned, please provide exact contents of the notification/error and a screenshot if possible to email@example.com.