Samsung Phone Says “Not Registered on Network”

“Not registered on network” means the Galaxy phone has not successfully registered its mobile line with the carrier. It is not usually a Samsung Account login problem, and changing the Samsung Account will not activate a SIM.

Find out whether the failure is local or complete

Turn Wi-Fi off and test a call, SMS, and webpage in two locations if practical.

• The error occurs everywhere: focus on SIM/eSIM activation, account status, compatibility, or carrier provisioning.
• It occurs in one building or neighborhood: check coverage and a carrier outage.
• Calls fail but mobile data works: tell the carrier it is a voice registration problem.
• No SIM or eSIM is shown: fix the SIM installation or activation before resetting network settings.

Emergency calls may still be possible through an available network. Do not make test emergency calls.

Confirm the carrier line and SIM

Sign in to the carrier over Wi-Fi and verify that:

• the line is active and paid
• a number transfer is complete
• the Galaxy model and IMEI are allowed on the network
• the correct physical SIM or eSIM is assigned
• the device is carrier-unlocked when required

If you recently changed carriers, Samsung specifically advises contacting the current carrier about reprogramming or service. A phone can display signal bars yet still lack the correct line registration.

For a physical SIM, power the phone off before removing it. Inspect it for damage and reseat it in the correct orientation. Do not trim a SIM or place metal, paper, or an adapter into the tray. For eSIM, use Settings > Connections > SIM manager to confirm the intended plan is present and on.

Refresh automatic network registration

1. Turn Airplane Mode on for 15 seconds, then off.
2. Restart the phone.
3. Open Settings > Connections > Mobile networks.
4. Use the carrier’s recommended Network mode; an automatic 5G/LTE/3G/2G option is normally safer than locking to an unavailable technology.
5. If Network operators is available, turn on Select automatically.

Menu labels vary by Galaxy model, software version, and carrier. Do not choose a different carrier from the manual operator list: the phone cannot register on a network your plan does not authorize.

Update without using hidden codes

Connect to Wi-Fi and install current Galaxy software under Settings > Software update. Carrier configuration can also arrive with normal updates or after a carrier reprovisions the line.

Avoid dialer “secret codes,” unofficial firmware, and copied APN lists. APN settings affect data; they do not normally repair voice registration, and the wrong values can create another problem.

Reset mobile network settings last

After the carrier confirms the account, SIM, IMEI, and coverage:

1. Open Settings > General management > Reset.
2. Choose Reset mobile network settings when that separate option is available.
3. Read the confirmation and reset.
4. Restart and retest with Wi-Fi off.

Some models group Wi-Fi and Bluetooth with network reset. Samsung notes that a broader reset can remove saved Wi-Fi networks and Bluetooth pairings. Record anything you need first.

Do not factory-reset the phone unless Samsung or the carrier has ruled out provisioning and directs you to do so. A factory reset cannot activate a suspended line or complete a number port.

What to tell the carrier

Give the exact error and ask:

1. Is this line active on this IMEI and SIM/eSIM ID?
2. Is the device compatible and unlocked for this network?
3. Is the number port complete?
4. Is there an outage at the locations tested?
5. Can the line be reprovisioned for voice, SMS, and data?

Share IMEI and SIM identifiers only in the carrier’s authenticated app, site, store, or support channel.

Frequently asked questions

Is “Not registered on network” a Samsung Account error?

No. It refers to registration with the mobile carrier network, not sign-in to your Samsung Account.

Can a bad APN cause this message?

An APN can break mobile data, but network-registration errors usually point to the SIM, line, carrier access, or radio network. Do not change APNs unless the carrier provides the exact values.

Why did it start after switching carriers?

The new carrier may not have completed the number port, linked the correct IMEI and SIM, or approved the device. Ask it to verify and reprovision the line.

Should I select a network operator manually?

Use automatic selection unless your carrier tells you otherwise. Choosing an unauthorized operator will not give the line service.

Will a factory reset activate the phone?

No. It cannot fix an inactive account, incompatible IMEI, unfinished port, or carrier outage.