After market vending of feature-provisioning software to qualified third party mobile wireless communication devices is facilitated by providing a joint software vending machine website capable of authenticating the device and wireless service provider and downloading and activating only software appropriate to that particular user device and wireless network service provider. The exemplary system provides device/user qualification and/or authentication as well as device provisioning for mobile wireless communication devices that may be manufactured by different vendors for different purposes and serviced by different wireless network service providers via a wireless infrastructure which includes a communication data relay service provider.