sim card replacement

[Jaroslaw12]

please change my sim card because it is not working properly in my phone.

[Bambino · Accepted solution]

@Jaroslaw12 This is not O2. This is a customer community. Either call in store, or if you have no phone download Skype to speak to customer service. Guide: A Guide to Skype 
Call 0800 902 0217 or 0800 032 1402
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 the suggestion above doesn't get you through.
Best time to call is 8 am.
You can also reach O2 via social media:
Facebook (https://o2uk.co/O2CFB), Twitter (https://o2uk.co/O2CTW), or Instagram (https://o2uk.co/O2CIG)