A device may receive, from a subscriber identity module (SIM) over-the-air (OTA) (SIM OTA) device, a short message peer-to-peer (SMPP) message. The SMPP message including an international mobile subscriber identity (IMSI) associated with a user device. The SMPP message being associated with modifying a universal integrated circuit card (UICC) of the user device. The device may determine, using the IMSI associated with the user device, a network device to which the user device is connected. The device may provide, to the network device, a short message service (SMS) message associated with modifying the UICC of the user device to permit the UICC of the user device to be modified.