How does ESim work? Is it worth having?
Looking to add another number to the phone that I already have, for my business.
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They work the same as regular physical sims, except they are digital, so you don't get a little card to insert, you just configure the service directly in the Phone Settings instead.
Wether it's worth it, depends on you. It would be very convenient if you need a secondary line for calls and messages. Nothing particularly bad or wrong with them.
Read the Support document you posted from: Using Dual SIM with an eSIM