23-07-2012, 18:00
In general, Italian SIMs can be reactivated for something less than one year (e.g. 11 months, 364 days, etc) from the last top-up. There is also a minimal usage requirement to keep the SIM alive. This is often fulfilled by a brief web session or sending a text message. It also might be that you are not in Italy and you did not activate international roaming?
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