The exemplary embodiments of the invention include inputting, at a device, a voucher having a plurality of data fields, where the voucher provides provisional subscriber identification for the device, sending at least some of the voucher data fields to a network operator, based on the sent information, receiving a software based subscriber identity module, and using the software based subscriber identity module to authenticate the device. Further, the exemplary embodiments include receiving a voucher having a plurality of data fields from a device, where the voucher provides provisional subscriber identification for the device, in response to the voucher code, sending to the device a request for additional information, in response to the request, receiving an additional data field of the voucher and a security identifier of the device, and based on validating the additional information using the security identifier, sending a software based subscriber identity module to the device.