Installation of a voice client for roaming devices in a wireless network

A mobile device may obtain wireless network connectivity from a local telecommunications provider by replacing a card in a mobile device associated with the user. In one implementation, a method may include receiving identification information relating to a mobile device; determining, based on the identification information, that the mobile device is compatible with a wireless network; transmitting, based on the determination that the mobile device is compatible with the wireless network, a Voice over Long Term Evolution (VoLTE) client application to the mobile device, the VoLTE client application providing functionality, for the mobile device, relating to usage of VoLTE services in the wireless network; and communicating, with the mobile device and the VoLTE client application, to provide one or more VoLTE services to the mobile device.