I recently got a new 5G Apple 12 phone. My sim is a 4G how do I get a 5G sim.
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Quickest way is to pop instore. They will transfer everything over for you.
However if you call O2 on any number in this guide Guide: How to find help & contact O2 they will send you a 5G sim and you just need to do a sim swap Guide: Sim Swap: a mini guide 2017 update
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