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Wow this is a serious game changer, I was thinking about this the other day. I would be great to be able to turn off and on a sim card in your smartphone. So if you were using an iPhone and wanted to use your Android phone you just turned the iPhone sim off and used your android phone without having to call and de-activate it everytime.


Dual-SIM plans have been around since the 90's. You call a special number (* # whatever *) to toggle which one calls and SMS arrive to.




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