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What's a "pair SIM"? It appears ungooglable.

Is this what kalleboo is referring to https://kyivstar.ua/en/mm/services/voice/sim_pair ?

> Incoming calls, messages etc. can be taken only by one of the mobile terminals, in which SIM-card is in so-called “active” state. Accordingly, SIM-card in another mobile terminal is passive and any outgoing operations can be made from this device.

> To transfer basic SIM-card into active state it is necessary to dial 1071#. combination on mobile device keyboard. In this case extra SIM-card automatically transfers into passive mode. To transfer extra SIM-card into active state it is necessary to dial 1072#. combination on mobile device keyboard. In this case basic SIM-card automatically transfers into passive mode.

Yeah, I can understand why Apple didn't go down this path.

Seems to be a restriction of that particular carrier. I used multi / pair sims regularly years ago on several German networks (I.e. for car phones) and they would all ring on incoming calls. However only one card would receive SMS messages. But that should not have been a problem since iOS can already share them between devices.

Sort of related, I have a second sim card with t-mobile US that allows for calling, receiving and sending texts, all from my primary number. This was the other part of their DIGITS beta.

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