Changing from iOS 4g to Android 5g

[VChumba]

Morning all. I've made the leap of faith from an iPhone XS Max to the Samsung S21 Ultra. The query I've got is with the SIM card. As for iPhone is 4g, do I need to do anything for my new 5g phone? I dont know if I do need to for either the extra "g" or for the size of the SIM

EDIT - the contract I have is a SIM only, and the phone has been purchased via a third party vendor

[madasaf1sh · Accepted solution]

@VChumba

If you want to use 5G (where it is available) then you will need a 5G sim card, which you should have received with the new phone, If not then your 4G sim will work just fine.

If you didn't receive a new sim,then you will need to contact Customer Services on 202

[MI5]

@VChumba 

Your old sim will only be 4g capable, so you'll need a new 5g sim from O2.

Once you get the sim, you do a sim swap from your old sim to activate the new one Guide: Sim Swap: a mini guide 2017 update 

You also need to ask O2 to switch your data bolt on to "standard" data,

You'll need to contact O2 for this.
All numbers are in this guide Guide: Coronavirus Community Help and Support 
When you call, you will be asked for 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.
You can also try saying "Upgrade" or "Fraud" to be connected to an advisor.
8.00am is the best time to call if you can.

[VChumba]

Perfect, and thank you for that. I purchased the phone separate, however your answer has helped. Thank you again!

[VChumba]

Great answer, thank you for the help

[MI5]

You're welcome @VChumba