To block your SIM card:
Call 8002 8004 free of charge or +352 2424 8004 from abroad, or visit a POST outlet carrying a piece of ID.
Please note that only the line holder may make this request. The caller will be asked security questions to confirm his or her identity.
Call us free of charge on 8002 8004 or +352 2424 8004 for international calls, 24/7.
Find your closest POST Telecom shop.