on 15-01-2021 20:01
15-01-2021 20:10 - edited 15-01-2021 20:11
15-01-2021 20:10 - edited 15-01-2021 20:11
You 100% do need a new 5g sim unless your sim was issued since October 2019.
Call again and hope you get someone who knows what they are talking about.
on 15-01-2021 21:35
on 15-01-2021 21:35
@MarkyMoo85 You can use your 4G sim in your new 5G phone but you won't get the 5G service.
You can also check here to see if 5G is available in your area: O2 | Service Status If it isn't you can carry on using your 4G sim until it is.
If it is available you can request that you be sent a 5G sim and you can then swap it: SIM Swap: a mini guide (incl eSim) - O2 Community