My father has an issue with a sim card probably.
He can't receive any message (including 4 digit code for authorization) or call or perform any of these: call, text, check his balance.
FAQs and technicians are not finding solutions or cannot help me for "security reasons".
I have SIM card serial number as authentication.
What would be a course of action to maybe receive a new card with the same number, as O2 shops are closed.
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