@Arina21
Not sure where you are, but your options will be stated here in this link.
https://www.o2.co.uk/international/using-your-phone-abroad
Unless you can make the changes yourself on the phone or in your MyO2, you will need to contact O2 directly.
Guide: How to find help & contact O2
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.
