sequential (97) Common network and switch network

https://wodewangzhishime.blogspot.com/2023/08/blog-post.html

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Ref:https://wodewangzhishime.blogspot.com/2021/09/accompany-journalists.html .

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John : Take a look.  https://kamchihau.blogspot.com/2022/09/different-frequency.html?m=1 . It's about a 3rd party's common network.  Now, we talk about network switching. 

Me: Ok. 

John : SIM Card A and B are in different network.  In order to communicate with each other,  SIM card A switch switch himself and the Cache of his physical address to France's network temporarily. 

Me: In this case,  SIM card A is the master and SIM Card B is the slave. 

John : Yes,  SIM card A pay the Communication Cost.