How to Fix the “Phone Not Registered on Network” Error on Android

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A guide to fixing your phone’s network issue once and for all
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Are you seeing a "not registered on network" error on your Android or Samsung phone? A misaligned SIM card, a network outage, incorrect settings, or old software can be causing the "not registered on network" error message. Since this may not be only a carrier-related issue, here are some troubleshooting steps you can take to fix the network issue yourself.

Quick Steps

  1. Restart the phone and Wi-Fi for simple solutions.
  2. Update your Android software and reinsert the SIM card.
  3. Toggle Airplane Mode to force the network to reload, and reset your network settings.
  4. If you can, manually select your carrier's network and the network mode.
  5. Contact your carrier for more help.
1

Restart your phone.

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  1. To turn off your phone quickly, swipe down from the top of your screen to open the Quick Settings panel, then tap the Power icon and select Power off .
    • Alternatively, press the Power button on the side of the phone and tap Power off .
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2

Restart Wi-Fi.

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  1. After rebooting your phone, turn off Wi-Fi, wait a few seconds, then turn it on again to reload the connection. This step may clear temporary glitches in the network that cause the "not registered to network" error.
3

Update your Android software.

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  1. If you recently updated, see if you can download and install the update again since the previous update may have been corrupted.
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4

Reinsert the SIM card.

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  1. You'll get the network message if the SIM card is inserted wrong. Dropping your Android or jostling it can unseat the SIM card too. Use a paperclip or thin tool to remove the SIM card tray so you can remove and reinsert the SIM card.
    • Taking it out and putting it back in can also fix your "No SIM" error .
    • Not all phones have physical SIM cards, so skip this step if you have a digital SIM card.
5

Turn Airplane Mode on and off.

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  1. You can turn on Airplane mode quickly by swiping down from the top of your screen to open the Quick Settings Panel, then tapping the Airplane Mode icon to turn it on. Tap it again to turn Airplane Mode off.
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6

Reset network settings.

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  1. To reset network settings for Samsung, go to Settings > General management > Reset > Reset all settings .
7

Manually select your network.

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  1. To select your mobile carrier, go to Settings > Connections > Mobile networks > Network operators > Search now > Your Carrier .
    • Not every phone has the ability to manually select the network. Most locked phones don't have this feature and have a greyed out toggle for "Select automatically." In this case, skip this step.
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8

Change the network mode.

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  1. For example, if you're visiting an area with 2G or 3G coverage but you're used to getting 5G, you'll most likely get the "not registered on network" error message until you switch your phone to use the slower networks.
    • Newer phones like the S21+ may not support this customization. Instead, the switch is supposed to be automatic so your phone will use whatever network offers the strongest connection.
9

Contact your carrier.

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  1. If you tried everything in this troubleshooting guide and still see a "not registered on network" error message, you might be experiencing something that only the carrier can handle. For example, there might be an outage in your area or the SIM card ports in your phone are damaged. But your carrier will be able to help further. [1]
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      References

      1. ↑ https://eu.community.samsung.com/t5/galaxy-note-series/not-registered-on-network/td-p/5790687

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