I have asked around in RL, and consensus seems to be that the phone would work technologically, incoming calls would ring both phones, outgoing calls would show up on both phones' call lists, and it probably wouldn't be worth the risk depending on how scared of paradox you are.
(Apparently you *can* clone a sim card and have two phones that ID as the same phone running at the same time, as long as they aren't using the same tower/local network, so that behaviour is testable, and all phones should automatically sync themselves software-wise to the network, so the temporal displacement wouldn't be a problem.)
*I would figure out a way to skip back in time a just a few days, but in such a way that it would be incontrovertibly provable that I had time travelled. Given proof, science would greatly accelarate their own work on time machines, so that within my lifetime a version that reliably moves me both back *and* forward will have been invented, and I can go as many places as I want. :D
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Date: 2010-04-10 02:30 am (UTC)(Apparently you *can* clone a sim card and have two phones that ID as the same phone running at the same time, as long as they aren't using the same tower/local network, so that behaviour is testable, and all phones should automatically sync themselves software-wise to the network, so the temporal displacement wouldn't be a problem.)
*I would figure out a way to skip back in time a just a few days, but in such a way that it would be incontrovertibly provable that I had time travelled. Given proof, science would greatly accelarate their own work on time machines, so that within my lifetime a version that reliably moves me both back *and* forward will have been invented, and I can go as many places as I want. :D