New iPhone 12 from Apple on existing unlimited tariff - will 5G work?

[YaBoi]

I have an in-contract unlimited data tariff and have purchased a 12 mini to replace my O2 11 Pro directly from Apple. Do O2 tariffs have to be 5G specific to work on 5G, or will existing tariffs work on 5G when its available in the area?

[MI5 · Accepted solution]

@YaBoi 

All tariffs are 5g but you'll need a new sim from any O2 store to access the 5g network.

You can also call O2 to get a new sim sent out Guide: Coronavirus Community Help and Support 

[YaBoi]

My O2 sim on my iPhone 11 Pro is an eSIM, and Apple looks to allow eSIM transfers without the carrier (https://support.apple.com/en-gb/HT210655).

Would I still need a new eSIM to allow 5G?

[MI5]

@YaBoi 

If the Apple eSim is 5g no, as your tariff already supports 5g it's just the sim you need.