There can be several reasons why your Samsung Galaxy phone is showing a “Not Registered on Network” error. Here are some steps you can try to fix it:

Basic Troubleshooting:

• Restart your phone: A simple restart can often resolve temporary glitches. Press and hold the power button and the volume down button together for more than 7 seconds to restart your phone.
• Check Airplane Mode: Ensure Airplane Mode is turned off. Swipe down from the top of your screen and tap the Airplane mode icon to disable it if it’s on.

Network Settings:

• Enable SIM card: Make sure your SIM card is enabled and not disabled in your settings.
• Disable Wi-Fi: In some cases, a weak Wi-Fi connection can interfere with cellular connectivity. Try turning off Wi-Fi to see if it helps.
• Change Network Mode: Your phone might be set to a network mode that your carrier doesn’t support. Try switching between LTE and 5G (or 3G/2G if applicable) to see if it makes a difference. Go to Settings > Connections > Mobile networks > Network mode and choose a different option.
• Manually select network operator: Sometimes, the phone might not automatically connect to the correct network. Try manually selecting your carrier’s network: Go to Settings > Connections > Mobile networks > Network operators. Choose “Select automatically” to disable it and then search for available networks. Select your carrier’s network from the list.

Advanced Troubleshooting:

• Reset Network Settings: This will erase all your Wi-Fi passwords, Bluetooth connections, and other network settings. It’s a good option if the above steps don’t work. Go to Settings > General management > Reset > Reset network settings. Enter your PIN or password to confirm.
• Reinsert SIM card: Take out your SIM card, gently clean the contacts, and put it back in. Make sure it’s inserted correctly.
• Update software: An outdated software version can sometimes cause network issues. Check for software updates and install them if available. Go to Settings > Software update > Download and install.

Additional Tips:

• Contact your carrier: If none of these solutions work, there might be an issue with your SIM card or your carrier’s network. Contact your mobile carrier’s customer support to see if they can help diagnose the problem.
• Use a different SIM card: If you have another SIM card from the same carrier, try using it in your phone to see if the problem persists. This can help identify if the issue is with your specific SIM card.

By following these steps systematically, you should be able to fix the “Not Registered on Network” error on your Samsung Galaxy phone.