I have upgraded to an iPhone 13 pro. It has arrived with a new sim. Do I need to use the new sim or simply swap my existing sim into the new phone
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The new sim will be 5G so you can swap Guide: Sim Swap: a mini guide 2017 update
Or just use the old sim which will only be 4G. If you swap, you will need to be in an area which offers 5G though.
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