"IDENTITY VERIFICATION CODES

As an added layer of security designed to help keep your account safe from unauthorized users, we use two-step verification to verify your identity. For example, two-step verification may be required when you are initially setting up your account, or when you are attempting to access your account from a new or unrecognized device or location. When it is required, we will generate and send you a single-use identity verification code to enter onto the screen where prompted in order to gain access to your account. There is no need to sign up for this feature. It is an automatic service for your added security and protection. Please note that standard wireless carrier message and data rates may apply for SMS text messages. Carriers are not liable for any delayed or undelivered messages."
 https://policies.account.samsung.com/terms?type=TC&appKey=j5p7ll8g33&applicationRegion=usa&region=usa&language=eng#:~:text=IDENTITY%20VERIFICATION%20CODES,or%20undelivered%20messages.