does call forwarding work with the cellular provider

Question

Android has a feature to set up call forwarding. Does this send a command to my cellular provider or is it something the phone does?


— IttayD | Sources

Answer

It's something done at your ISP's server side.



To make a test: Configure it, and shutdown your phone. Grab another phone and call, you'll see you don't get a "User has shut down" prompt but directly connect to someone (you've set).


— iBug | Sources

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