Changing phone and changing my sim only tariff

[RockGeekGB]

I have a Samsung S10+ but i am swapping it for a new Iphone 12, and i also want to change my tariff, so if i go through the process on my O2 of getting a new tariff wil i get sent a new sim card, or will the sim in the Samsung S10+ work in the Iphone.

Thanks

Gary

[MI5 · Accepted solution]

@RockGeekGB 

You keep your current sim and it will work in the iP12, but, you won't get 5g without a 5g sim and you'll need to get O2 to change your data bolt on to iData for iPhone.

You'll need to call customer service.
Numbers here Guide: Coronavirus Community Help and Support 
When it comes to the reason you are calling stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
Say "Upgrade", "Lost/Stolen" or "Fraud" if you have to, to get put through to someone.
8.00am is the best time to call if you can.

[RockGeekGB]

Ah thanks, when i go through the changing tariff process it asks me if my phone is 5G, will i be automatically sent a new Sim?

[MI5]

@RockGeekGB 

You'll need to tick the box for a new sim too