@General8Yes, you can pay more off each month, but you need to call each time.
regards point 2, it's because you also pay for your data plan as well, as you cant buy it on refresh without one.
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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