Enabling voice over long term evolution (VoLTE) services for non-VoLTE inbound roamers

A system, comprising a gateway configured to:

• observe a registration of a mobile device of a subscriber from a home public land mobile network (HPLMN) into a Long Term Evolution (LTE) access network of a visited PLMN (VPLMN) when the HPLMN is not capable of providing voice over LTE (VoLTE) services and the VPLMN provides the VoLTE services over the LTE access network;
• update, in response to the registration, location information of the mobile device in a home location register (HLR) of the HPLMN, wherein the location information of the mobile device corresponds to location information of the gateway in the VPLMN;
• and
• create a local Intelligent Multimedia sub-System (IMS) subscription with telephony services in a local IMS in the VPLMN based on the updated location information.

A computer program product, comprising a non-transitory computer readable medium comprising:

• code for observing, at a gateway in a visited public land mobile network (VPLMN) of a mobile device of a subscriber, registration of the mobile device from a home PLMN (HPLMN) into a Long Term Evolution (LTE) access network of the VPLMN when the HPLMN is not capable of providing voice over LTE (VoLTE) services and the VPLMN provides the VoLTE services over the LTE access network;
• code for updating, in response to the registration and at the gateway, location information of the mobile device in a home location register (HLR) of the HPLMN, wherein the location information of the mobile device corresponds to location information of the gateway in the VPLMN;
• and
• code for creating a local Intelligent Multimedia sub-System (IMS) subscription with telephony services in a local IMS in the VPLMN based on the updated location information.