Which numbers you dial to block a sim card?

To block a SIM card, you can contact your mobile network provider and request them to block the SIM card. The customer service number for your mobile network provider can usually be found on their website or on the back of your SIM card packaging. Additionally, you can also dial the emergency number for your country (such as 911 in the United States) to report a lost or stolen phone and request that the SIM card be blocked.

You cannot block a SIM card by dialing a specific number.