I have been with o2 forever but the last Yr of so I get no signal people can't ring me or hear me I struggle to ring anyone
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@Lisa06 See if these guides help:
How can I sort out my network issues? - o2uk
Why do I have poor coverage indoors? (o2.co.uk)
I DO NOT WORK FOR O2
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Track usage, upgrade and get support with the My O2 app