@alanahthompsonYou will need to Call Customer Services on 202 from your o2 phone or 0344 809 0202 from any other phone, as if it you do it in myo2 it will send a verification link to the old email address.
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iPhone 16 Pro Max - o2 and Spusu
Xperia 1V - Spusu
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This is not customer services and we dont have access to your account
I do not work for o2 or any VMo2 /Telefonica/Liberty Global Company