Block SIM card - how it works

If you have lost your cell phone or it has been stolen, you should immediately block your SIM card from the network operator. In this guide, we will show you how this works.

How to lock your SIM card

• The SIM card must be blocked by the respective provider after the loss. This works either over the phone or over the Internet.
• To block the SIM card by phone, you must identify yourself on the phone. Depending on the provider, you need different information. Please have your contract documents ready.

Block SIM card from the provider

• Vodafone: You need your customer password to block Vodafone. Customers with a term contract dial the number +49 172 12 12, CallYa customers call +49 172 229 0 229.
• Telekom: Here you need the card number of your SIM card to block it. You can reach the hotline on 0800 3 302202. The block can also be blocked via online access.
• O2: You can reach the hotline on 0176 888 55 282. You can find the function online at Mein O2.
• E-Plus: With E-Plus the service is apparently only offered via a hotline. Contract customers dial 0049 177-177-1000, business customers 0049 177-177-1010 and prepaid customers 0049 177-177-1150.
• Base: To block your base SIM, you only have to log in via online access. There you can initiate the block under "My SIM card".