Not Registered on Network Error on Samsung Galaxy Note: Fixes

If your Samsung Galaxy Note shows “Not registered on network,” the phone has lost its connection to your carrier’s network, and the fix usually involves re-selecting the network, re-inserting the SIM, or updating the phone’s software. This error is common after a software update, a SIM card swap, or when traveling to a new region, and most cases can be resolved at home in under ten minutes without contacting support.

What Causes the “Not Registered on Network” Error

The message means your Galaxy Note is powered on and has a SIM card, but it cannot complete the registration process with your carrier’s tower. The phone is essentially being rejected or ignored by the network. Common triggers include:

A recent Android or carrier software update that reset network settings
A SIM card that is loose, damaged, or not fully inserted
Incorrect network mode (e.g., set to 5G-only in an area with no 5G)
Carrier-side issues such as an unpaid account, a deactivated SIM, or an outage
IMEI or account mismatch, often after buying a used phone or switching carriers
Airplane mode toggling incorrectly, leaving the radio in a bad state

On older Note models (Note 8, Note 9, Note 10), the error also appears after a factory reset when the phone cannot re-authenticate with the carrier automatically.

Quick Fix: Toggle Airplane Mode and Restart

Start with the simplest action, because it resolves a surprising number of cases. The phone’s radio stack can get stuck after a failed handoff between towers or after waking from deep sleep.

Swipe down from the top of the screen to open the quick settings panel.
Tap the Airplane mode icon to turn it on. Wait 10 seconds.
Tap it again to turn Airplane mode off.
Press and hold the side key, then tap Restart.
After the phone reboots, wait 30–60 seconds for it to re-register. Check the status bar for signal bars.

If the error persists, move to the next step: manually selecting your carrier network.

Manually Select Your Carrier Network

Sometimes the phone fails to automatically pick the correct network, especially after a SIM swap or when roaming. Forcing a manual selection often clears the error.

Open Settings.
Tap Connections.
Tap Mobile networks.
Tap Network operators.
Turn off Select automatically.
Wait for the list of available networks to appear. This can take up to a minute.
Tap your home carrier’s name (e.g., the same name as on your SIM card).
Wait for it to register. If it fails, tap it again.

If you are traveling internationally, select the local carrier that your roaming plan supports. If no network appears in the list, the SIM card or the phone’s radio hardware may be the issue.

Remove and Reinsert the SIM Card

A SIM that has shifted slightly in its tray can cause intermittent registration failures. The contact pins on the SIM or the tray itself may be dirty or bent.

Power off the phone completely.
Insert the SIM ejector tool (or a paperclip) into the small hole on the SIM tray.
Pull the tray out gently.
Remove the SIM card and inspect the gold contacts. Wipe them lightly with a dry, soft cloth if they look dull.
Reinsert the SIM card firmly into the tray, ensuring it sits flat.
Push the tray back into the phone until it clicks.
Power on the phone and check the signal.

If you have a second phone available, put the SIM in that phone to test whether the SIM itself is working. If the second phone also shows “Not registered,” the problem is almost certainly the SIM or your carrier account, not the Note.

Reset Network Settings

Resetting network settings clears saved Wi-Fi networks, Bluetooth pairings, and all mobile network configurations, returning them to factory defaults. This is a common fix after a software update corrupts the carrier configuration.

Open Settings.
Tap General management.
Tap Reset.
Tap Reset network settings.
Confirm with your PIN or password if prompted.
Restart the phone.

Note that this will erase saved Wi-Fi passwords and Bluetooth devices, so you will need to reconnect to your home Wi-Fi and re-pair your earbuds or watch afterward. It does not delete photos, contacts, or apps.

Check for Software Updates and Carrier Updates

Samsung and carriers occasionally push updates that fix network registration bugs. A pending update can leave the phone in a state where it cannot authenticate with the tower.

Open Settings.
Tap Software update.
Tap Download and install.
If an update is available, install it and restart the phone.

Also check for carrier-specific updates by opening Settings > Connections > Mobile networks > Carrier settings (the exact name varies by region). Tap Update if the option appears. These updates are small configuration files that tell the phone how to talk to the carrier’s towers.

When the Problem Is the SIM or the Carrier

If none of the above steps work, the issue is likely outside the phone’s software. The most common external causes are:

SIM card failure: SIM cards can die after years of use. A replacement SIM from your carrier is usually free or low-cost.
Account suspension: An unpaid bill, a deactivated line, or a recent port that did not complete will cause this exact error. Log into your carrier’s account portal or call them to verify the line is active.
IMEI blacklist: If you bought the phone used, the original owner may have reported it stolen, or the phone may be locked to a different carrier. Check the IMEI status with your carrier.
Local outage: Carriers have temporary outages. Check the carrier’s status page or ask someone nearby with the same carrier if they have signal.

One final thing to try before contacting support: remove the SIM, power on the phone without it, wait for the “No SIM” message, then power off and reinsert the SIM. This forces the phone to rebuild its radio registration state from scratch.

Frequently Asked Questions

Will a factory reset fix the “Not registered on network” error?

Sometimes, but only if the error is caused by corrupted system files. A factory reset erases all data, so back up your phone first. If the error is due to a carrier account issue or a dead SIM, a factory reset will not help.

Does this error mean my phone is blocked or stolen?

Not necessarily. The error appears for many reasons, including simple software glitches. However, if you bought the phone used and the error persists after all troubleshooting, check the IMEI with your carrier to see if it is blacklisted or still locked to another network.

Why does the error appear only after I update the software?

Software updates can reset carrier configuration files or introduce a temporary bug in the radio driver. Resetting network settings or manually selecting the carrier usually resolves it. If it does not, the next update may fix it, so check for updates regularly.

Can I fix this error by changing the network mode to 3G or 2G?

Yes, this is a valid workaround. Go to Settings > Connections > Mobile networks > Network mode and select a mode that includes 3G or 2G (e.g., “LTE/3G/2G”). In some areas, the phone may fail to register on 5G or 4G bands but succeed on older bands. This is not a permanent fix, but it can restore service immediately.

Is there a difference between “Not registered on network” and “No service”?

Yes. “No service” usually means the phone cannot find any network at all, often due to being out of range or having a dead radio. “Not registered on network” means the phone finds the network but is being rejected during registration, which points more toward SIM, account, or software issues.

Should I contact Samsung support or my carrier first?

Contact your carrier first. The error is almost always related to the SIM, your account, or the network itself. Samsung support can help with hardware or software issues, but they cannot activate a SIM or fix a suspended account. Have your phone’s IMEI and your account number ready when you call.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

More in this bed

The whole Tech How-To bed →