Hello, I have just received a new Samsung S20 in the post to replace my old phone which was on the O2 network. I want to keep my old number and have started filling in a form on the O2 app but it asks for the new number. I can't find this anywhere but it's a required field. I've googled and tried all the suggestions, including About Phone under Settings but says the phone number is unknown. There is a notification to say the SIM is not provisioned but I don't know what this means. Thanks in advance for your help!
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