Add an additional SIM card to my account

[Donna-1975]

I have my phone and my daughters phone on O2 and now would like a SIM card for my son's phone.

[jonsie]

Looks like you should contact the sales team as they can help with that – message them on Social Media if that works best for you

See links below

Or you can call them from 8am to 8pm on 0808 002 0202 or 0800 081 0255

[MI5]

@Donna-1975 

Use USwitch
https://www.uswitch.com/mobiles/compare/sim_only_deals/o2/
Choose the deal you want
This will automatically redirect you to the O2 website
Just follow the prompts 
The change should show in My O2 within 24 hours
Volt benefits will still apply if applicable as will possibly a 3 month extra such as Disney+