T-Mobile requires this information in order to complete a credit history check and approve your application for wireless phones service. Your order may be delayed if this information is not accurate. T-Mobile requires a Social Security Number for orders placed online. If you do not wish to supply a SSN, you may go to a T-Mobile wireless phones retail store. Please note: The package price you have selected is not available in T-Mobile wireless phones retail stores. This information is secured by Verisign and Cybersource and is used for credit verification only. We will not use this information for any other purpose.