I use to standard sim card. I would ask how could I get a new nano sim card with the same mobile number.
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Hi @Anonymous You can get a sim from any O2 store...or online here https://www.o2.co.uk/shop/sim-cards
You would then need to do a sim swap http://swapmysim.o2.co.uk/
*The Game Is On*
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Instore is definitely the quickest and easiest option. If you are upgrading your phone it is usually supplied with the correct sim and a sim swap is necessary.
Track usage, upgrade and get support with the My O2 app