Replacement SIM

[SIMquery]

Please may I have a replacement SIM. ASAP

I think my old one is faulty.

[Bambino · Accepted solution]

@SIMquery You need to speak to customer service. Use Skype if you have no phone: Guide: A Guide to Skype 
Call 0344 809 0202, 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)

Alternatively, call into an O2 store if you have one nearby, and they will swap the sim for you. Be sure to bring photo identification with you.