@Kirstyh
If you're upgrading you need to do a sim swap Guide: Sim Swap: a mini guide 2017 update
If not, contact O2.
Message them on Social Media. Facebook (https://o2uk.co/O2CFB) , Twitter (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG) or give them a call on 202 or 0344 809 0202
Use Skype if needed Guide: A Guide to Skype
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