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A comment on A mobile phone that respects your freedom [video]. Parent comment

Re:A mobile phone that respects your freedom [video] by Rychard on Tuesday August 27, 2019 @05:57PM (#20814846)
When you pay for cellular service, you get a SIM card, which contains everything the phone needs for connecting to the cellular provider's network.

https://en.wikipedia.org/wiki/SIM_card

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