SIM card is asking for a PIN or network unlock code on Samsung phone

Last Update date : Oct 13. 2026

A SIM card or network lock may be preventing you from making calls or messages. There are several reasons why your device network might be locked when you insert a new SIM card. Read on to find out more about how to solve this issue.

SIM Card Lock

A SIM card lock protects your SIM from being used on other mobile devices. Follow the below steps to find out how to lock or unlock your SIM card.

1 Open the Settings app

2. Tap Biometrics and security

3. Tap Other security settings

4. Tap Set up SIM card lock

5. Tap Lock SIM card

6. Enter your SIM card PIN, then tap OK. The default PIN number will depend on your network provider. You can also find your SIM card’s PIN number on its original packaging.

7. Once the SIM card lock is activated, you can tap Change SIM card PIN to change your PIN number

8 To disable the SIM card lock, tap Lock SIM card again, then enter the PIN number.

Network Lock

If you originally received your device from one network provider and your new SIM card is from a different network, the original network provider may have locked the device to their network.

Samsung does not lock any of its devices to any particular network. You will need to contact the original service provider or retailer to request an unlock code.

Some service providers may allow you to unlock the device for a small charge or for free, whereas others may not allow the device to be unlocked at all.

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