Forgot SIM PIN - what to do?

You cannot start your smartphone without a SIM PIN. But what to do if you forget the number. We will help you further.

Forgot SIM PIN: The PUK code can help

First of all, don't worry too much if you forget your SIM PIN. Because you can still unlock the phone with your PUK (English for Personal Unblocking Key). Sometimes this is called "SuperPIN".

• You can find the code in the documents that you received with your SIM card or contract.
• Most of the time it is right next to the SIM PIN on the plastic card from which you removed the SIM card.

Unlock the SIM card using PUK

1. Start your cell phone with the SIM card inserted.
2. If you have not yet been asked to enter the PUK, enter your SIM PIN incorrectly three times. (Attention: As soon as you are asked for your PUK, you should not enter anything wrong!)
3. If you are asked for the PUK code, enter it. You can then choose a new SIM PIN.
4. You can use this to unlock your SIM card in the future.

PUK not found - what to do?

If you don't know your PUK or SuperPIN, there are several ways to get the number. If you enter the PUK incorrectly 10 times, the card will be permanently blocked and must be replaced.

• In the best case you will find the PUK in your documents. You received a letter with the SIM card. The PUK is noted there.
• With some providers you can view the PUK online. To do this, log in online at your provider and search for the corresponding function.
• If this does not work either, you must contact your provider directly. The fastest way is by phone. It is best to call the following number from the landline: 089 78 79 79 40 0 ​​(O2), 0800 33 01000 (Telekom), 0800 1721212 (Vodafone).
• Here you will find detailed instructions for the most common providers as well as other ways to get in touch with them.

In the next practical tip we will show you what to do if your SIM card is no longer recognized.