Parallel registration to offload plmn with single sim

A method of wireless communication comprising:

• receiving information associated with a user equipment (UE) that comprises a subscriber identifier, the UE attached to a first cellular network managed by a mobile network operator (MNO) via a first cellular communication link using a first instance of a radio protocol stack of the UE;
• establishing a second cellular communication link with the UE, using a second instance of the radio protocol stack of the UE, by attaching to a second cellular network managed by a non-MNO based at least on the received information;
• and
• maintaining the second cellular communication link while the UE is in communication with the first cellular network via the first cellular communication link,
• wherein the information associated with the UE is received from a home subscriber server (HSS) of the first cellular network through a Wx interface, wherein the information associated with the UE is received at an offload authentication, authorization, and accounting (AAA)/mobility management entity (MME) server, and
• wherein the first cellular network continues to function as a serving public land mobile network (PLMN) of the UE after establishing of the second cellular communication link.