Dynamically updating sim cards over the air

A SIM management system for a cellular network, comprising:

• a subscriber-identity-module (SIM) management portal that receives branding selections and network access selections from a guest network operator on the cellular network, wherein the selections apply to subscribers of the guest network operator;
• a SIM service in communication with the SIM management portal, wherein the SIM service is configured to generate SIM configurations that implement the branding selections and the network access selections on user devices associated with the guest network operator;
• and
• a SIM over-the-air (OTA) service in communication with the user devices over the cellular network, wherein the SIM OTA service is configured to update the user devices with SIM configurations selected by the SIM service,
• wherein the SIM configurations instruct the user devices to display branding set by the branding selections from the guest operator,
• wherein the SIM configurations instruct the user devices to use a network resource set by the network access selections from the guest operator.

A process for execution by user equipment (UE) subscribed to a guest network on a cellular network, the process comprising:

• transmitting a communication to a cellular network to trigger a dynamic update for a SIM card of the UE, wherein the communication includes an identifier associated with the UE, the guest network, or a subscriber;
• receiving a SIM configuration from a SIM OTA service of the cellular network, wherein the SIM configuration is selected for the UE based on the identifier;
• and
• installing the SIM configuration on the SIM card to configure branding and network access of the UE.