Hello, good day. I have my iPhone 4s with a prepaid sonera mini sim card. on the 21st of June 2012 i loaded a 20euro data credit for internet and since that day, i always receive the message 'Could not activate data cellular network'.
i do not know what to do. please i need a fast help
and if you do not understand me, then i will wish to request a call back service from the customer service.
thank you
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