What is the difference between sim operator and network operator

I worked with the Telephony API in android and came across these two functions:

getNetworkOperatorName: returns the alphabetical name of the current registered operator. getSimOperatorName (): returns the name of the service provider

My understanding is not so clear on these conditions. What is the difference between the two? Please provide some examples.

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The network operator is the operator. One that physically delivers data.

The SIM operator is the provider of your data. You probably have only one provider associated with your SIM card. But if you travel the world, then you will come across many different carriers.

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There is a difference in receiving information from the card.

Network operator code returns data only if it has a connection to the gsm network.

Sim Card operator code will always return a value, even if you are in airplane mode.

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