When updating your mobile phone on your account page, you will be prompted to verify your account information via SMS or email.
You will receive a 6-digit code that will expire in 10 minutes. Once the verification is complete, keep an eye out for another 6 digit code via text to the new mobile phone. You will need to enter this new code within 10 minutes. This will update the phone number on your account and be usable for 2-way communication. You will receive an email notification of the updated mobile number.