@Thanh
Your only option is to call customer services on 0344 809 0202 from another phone, and ask if there are any bars on your phone, bare in mind it can take between 24 and 48hrs for service to be restore on an overdue bill, that has had services suspended.
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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
