| CPC G06F 3/165 (2013.01) [H04B 17/318 (2015.01); H04W 28/10 (2013.01)] | 9 Claims |

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1. A network device comprising:
a Subscriber Identity Module (SIM);
one or more memories storing instructions, and
one or more processors capable of executing the instructions causing the network device to:
acquire a service setting based on a service contract from a management server that manages the service setting in association with the service contract;
execute, based on the service setting, a basic function for transmitting via a first communication using the SIM at least one of counter information of the network device, operation information of the network device and consumable information of the network device, wherein the basic function is regularly executed based on the service setting;
execute, based on the service setting, a display control for an optional function that requires a second communication using the SIM; and
execute the optional function including a data transmission via the second communication, wherein a communication volume of the second communication that had been used for the optional function is counted and managed,
wherein the display control is executed for providing a confirmation of a limitation related to the optional function and receiving a user intention of an execution of the optional function, and wherein the optional function is executed after the display control.
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