cell phone routing and switching

how does a cell phone work?   i understand it connects via 3g, or LTE or 4g, but on the internet end what is going on?  the internet has backbone routers connecting via BGP or MPLS to each other, what happens in between the internet backbone and the cell tower that distributes the LTE or 4g/3g signal? what protocols are involved? etc.
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I will try to explain as much as I hope you'll understand digestion
Your phone connects to the site. The site has BSC (base station controller)
From there he gets two parameters
sp & sc  (switch cell   & switch packaging)
From there you connect to the core network
This basic

If you want Feel free to contact me on Skype and I'll explain in simple conversation

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DavidAuthor Commented:
i dont have your skype number, but i'll look into the base station controller and switch cell and switch packaging more myself ( with the help of wikipedia)
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Cell Phones

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