@Donlou
If this is an upgrade you can use your old sim or do a sim swap to activate the new 5g sim Guide: Sim Swap: a mini guide 2017 update
Some iPhones are also shipped out with a shipping bar which will need O2 to remove it.
If you message O2 on Facebook (https://o2uk.co/O2CFB) , Twitter (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG) , they should be able to help you with this
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
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