APN Settings Missing, Locked, or Not Saving? 9 Fixes

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If your APN settings are missing, greyed out, locked, or your new APN disappears after you tap Save, the problem is usually related to the selected SIM, carrier configuration, APN restrictions, or incorrect carrier information not necessarily a damaged phone.

Start with the safe fixes below. Do not copy random APN settings from another carrier, country, or website. Get the correct APN from your carrier before manually entering anything.

Quick fix

On Android, select the SIM that provides mobile data, open the APN settings, and use Reset to default if the option is available. Samsung documents this procedure for Galaxy devices. If the APN menu is missing or locked, or a carrier-approved APN still will not save, contact your carrier because manual APN editing may be restricted.

Table of Contents

What does the APN problem look like?

This guide covers problems such as:

  • APN settings are missing
  • Access Point Names does not appear
  • APN settings are greyed out
  • APN settings are locked
  • The Add APN button is missing
  • The Save option does nothing
  • A new APN disappears after saving
  • An APN disappears after restarting the phone
  • APN changes keep reverting
  • The wrong carrier APN appears
  • APN settings disappeared after changing SIM cards
  • Mobile data stopped working after changing the APN
  • iPhone APN settings are unavailable

If your APN menu works normally but you have LTE, 4G, or 5G with no internet, this is a different problem. In that situation, use the dedicated Mobile Data Connected but No Internet troubleshooting guide instead.

Before changing anything: the 1-minute APN check

Do these quick checks first.

  1. Turn Wi-Fi off.
  2. Make sure a physical SIM or eSIM is active.
  3. Make sure Mobile data is turned on.
  4. If you have two SIMs, confirm that the correct SIM is selected for mobile data.
  5. Turn Airplane Mode on for about 10 seconds.
  6. Turn Airplane Mode off.
  7. Restart the phone.
  8. Check whether a system update is available.
  9. Confirm that your mobile plan includes active data service.
  10. Check whether your carrier is experiencing an outage.
  11. Confirm that the phone is compatible with the carrier.
  12. Obtain the correct APN information directly from the carrier before manually editing anything.

Do not start changing MCC, MNC, APN type, authentication, proxy, or other fields just because you found different values online.

1. Select the correct SIM for mobile data

This is one of the first things to check on a dual-SIM Android phone.

If the wrong SIM is selected for mobile data, the APN information you see may not correspond to the carrier you are actually trying to use.

Try this

Open:

Settings → SIMs / Mobile Network / Connections

The exact menu depends on the manufacturer and Android version.

Then:

  1. Find the Mobile data or preferred data SIM setting.
  2. Select the SIM that has your active data plan.
  3. Make sure the SIM is enabled.
  4. Turn Mobile data on.
  5. Open the network settings for that SIM.
  6. Look for Access Point Names or APN.

If the APN appears after changing the SIM

The problem was probably related to the previously selected SIM or its carrier profile.

If the APN is still missing

Continue with the next fix.

2. Reset APN settings to the carrier default

If your phone has a Reset to default option, this is one of the safest APN fixes.

Samsung’s documented Galaxy procedure is:

Settings → Connections → Mobile networks → Access Point Names → More options → Reset to default

The exact wording can differ between Galaxy models and software versions.

Samsung Galaxy steps

  1. Open Settings.
  2. Tap Connections.
  3. Tap Mobile networks.
  4. Tap Access Point Names.
  5. Select the correct SIM if your phone asks.
  6. Tap the three-dot menu.
  7. Tap Reset to default.
  8. Confirm the reset.
  9. Restart the phone.
  10. Turn Wi-Fi off.
  11. Test mobile data.

Other Android phones

The menu may instead be under:

Settings → Network & internet → SIMs → Access Point Names

or:

Settings → Mobile network → Access Point Names

You can also use the Settings search box and search for:

  • APN
  • Access Point Names
  • Mobile network
  • SIM

What should happen?

  • The phone should restore the APN profile supplied by the carrier/device configuration.
  • If the APN returns and mobile data works, the previous APN configuration was likely incorrect or incomplete.
  • If the APN list remains empty or locked, continue below.

3. Get the exact APN from your carrier

If the default APN is missing, do not guess the values.

APN information can differ depending on:

  • Carrier
  • Country
  • Region
  • Prepaid or postpaid plan
  • SIM or eSIM
  • Phone model
  • Carrier-specific firmware
  • Mobile-data service
  • MMS configuration

Samsung also advises obtaining the appropriate APN information from the network operator rather than assuming one APN applies everywhere.

Ask your carrier for:

  • APN name
  • APN
  • Username
  • Password
  • Proxy
  • Port
  • MMSC
  • MMS proxy
  • MMS port
  • MCC
  • MNC
  • Authentication type
  • APN type
  • APN protocol
  • Roaming protocol
  • MVNO type/value, if applicable

Your carrier may intentionally leave many of these fields blank.

Blank does not mean broken.

Only enter the fields your carrier tells you to enter.

4. Add a new APN and make sure it actually saves

Only do this if:

  • Your carrier supplied the exact APN values, and
  • Your phone allows manual APN creation.

Android steps

  1. Open Settings.
  2. Open your active SIM’s mobile-network settings.
  3. Tap Access Point Names.
  4. Tap Add, +, or New APN.
  5. Enter the exact carrier-provided information.
  6. Leave fields blank when the carrier says they should be blank.
  7. Do not change MCC or MNC unless the carrier specifically instructs you to.
  8. Tap the three-dot menu.
  9. Tap Save.
  10. Return to the APN list.
  11. Select the new APN.
  12. Restart the phone.
  13. Turn Wi-Fi off.
  14. Test mobile data.

Important

  • Saving the APN is not necessarily enough.
  • Some phones require you to select the newly created APN after saving it.
  • If it saves but another APN remains selected, your phone may continue using the old configuration.

5. APN settings are missing or greyed out

If Access Point Names is missing, greyed out, or locked, do not immediately assume the phone is defective.

Possible causes include:

  • No active SIM or eSIM
  • Wrong SIM selected
  • Carrier-controlled APN
  • Carrier restrictions
  • SIM provisioning problems
  • Phone firmware
  • Carrier-specific firmware
  • Device-management policies
  • Incompatible phone
  • Imported phone originally configured for another carrier
  • Software differences between manufacturers

Check these first

  1. Confirm that the SIM/eSIM is active.
  2. Select the correct data SIM.
  3. Turn Airplane Mode off.
  4. Turn Mobile data on.
  5. Restart the phone.
  6. Search Settings for APN.
  7. Check for a system update.
  8. Check whether the phone recognizes the SIM correctly.
  9. Confirm that the carrier supports the phone.
  10. Ask the carrier whether APN editing is allowed.

If the carrier controls the APN

Ask the carrier to confirm:

  • The APN assigned to your account
  • Whether manual APN editing is permitted
  • Whether your SIM/eSIM is correctly provisioned
  • Whether they can refresh mobile-data provisioning
  • Whether the SIM needs to be reprovisioned or replaced
  • Whether the phone is approved for their network

A locked APN menu is not something you should try to bypass with random apps or hidden codes.

6. APN settings will not save

If you enter a new APN, tap Save, and the profile disappears, check the information carefully.

Check the APN fields

  1. Make sure the Name field is not blank.
  2. Make sure the APN value exactly matches the carrier’s instructions.
  3. Remove accidental spaces.
  4. Do not add quotation marks.
  5. Do not copy extra spaces from a website.
  6. Use the exact APN type supplied by the carrier.
  7. Leave unspecified fields blank.
  8. Do not guess MCC.
  9. Do not guess MNC.
  10. Do not randomly change authentication.
  11. Do not randomly change APN protocol.
  12. Save the profile.
  13. Return to the APN list.
  14. Select the new profile.
  15. Restart the phone.
  16. Check whether it remains available.

If the APN still disappears

The problem may not be the information you entered.

The carrier or device software may be preventing manually created APNs from being used.

Contact the carrier and tell them: “The APN settings are available, but the APN disappears after I tap Save.”

Give them:

  • Exact phone model
  • Android version
  • Carrier
  • SIM/eSIM type
  • Plan type
  • APN values they supplied
  • Screenshot of the APN screen
  • Whether the Save button is missing or the profile disappears after saving

7. APN saves but disappears after restarting

This is slightly different from an APN that never saves.

If the APN appears correctly, works temporarily, and then disappears after rebooting, the carrier configuration may be restoring its own profile.

Try this:

  1. Reset the APN to default.
  2. Restart the phone.
  3. Check the APN list again.
  4. If the carrier APN is restored, select it.
  5. Test mobile data.
  6. If you still need a manual APN, ask the carrier whether manual APNs are supported on your plan/device.

Do not repeatedly create five or ten different APNs.

That makes troubleshooting harder and can introduce additional configuration problems.

8. Fix missing or locked APN settings on iPhone

iPhone works differently from many Android phones.

Apple states that you can only view or edit APN settings when your carrier allows it. If the APN menu does not appear, the correct action is generally to contact the carrier rather than trying to force the menu to appear.

Check the iPhone APN menu

Depending on the iOS version and region, look under:

Settings → Cellular → Cellular Data Network

or:

Settings → Mobile Data → Mobile Data Options → Mobile Data Network

If neither option appears, your carrier may not permit manual APN editing.

If the APN fields are available

  1. Get the exact APN information from your carrier.
  2. Open the APN settings.
  3. Enter only the carrier-approved values.
  4. Leave unspecified fields blank.
  5. Return to the previous screen.
  6. Test cellular data.

Apple states that supported APN changes save automatically.

Reset iPhone APN settings

If the option is available:

Settings → Cellular → Cellular Data Network → Reset Settings

This returns the APN information to the carrier defaults.

9. Check for an iPhone carrier settings update

If the problem started after:

  • Installing a new SIM
  • Installing an eSIM
  • Changing carriers
  • Setting up a new iPhone
  • A cellular configuration change

check for a carrier settings update.

Steps

  1. Connect the iPhone to Wi-Fi if possible.
  2. Open Settings.
  3. Tap General.
  4. Tap About.
  5. Wait for a carrier update prompt.
  6. Install the update if one appears.
  7. Restart the iPhone.
  8. Test cellular data.

Apple says carrier settings updates can update network configuration and may be required after installing a new SIM or eSIM.

Should you reset network settings?

A network reset can be useful, but it should not be your first APN fix.Try the APN reset and carrier checks first. A network reset can remove network-related information such as:

  • Saved Wi-Fi networks
  • Wi-Fi passwords
  • Bluetooth connections
  • Mobile-network settings
  • Some manually entered network configurations

It does not normally erase your personal photos, apps, messages, or other personal files when you select a network-only reset.

Samsung Galaxy

Depending on the model:

Settings → General management → Reset → Reset network settings

or a similarly named mobile-network reset option.

Samsung documents network resetting as a troubleshooting step for connectivity problems and notes that menu names can vary by device and software version.

Other Android phones

Search Settings for:

  • Reset network settings
  • Reset mobile network
  • Reset Wi-Fi, mobile & Bluetooth
  • Network reset

Use the manufacturer’s instructions for your exact model.

Why are my APN settings missing?

The most common possibilities are:

  1. The wrong SIM is selected.
  2. There is no active SIM/eSIM.
  3. The carrier automatically manages APN settings.
  4. The phone does not permit manual APN editing.
  5. The carrier profile has not been provisioned correctly.
  6. The phone uses carrier-specific firmware.
  7. The device is incompatible with the carrier.
  8. A device-management policy controls network settings.

On iPhone, Apple specifically states that APN viewing/editing depends on carrier permission.

Why are my APN settings greyed out?

A greyed-out APN does not automatically mean the phone is damaged.

The carrier, SIM configuration, firmware, or device-management policy may control the APN.

If the settings are greyed out:

  1. Confirm the correct SIM is selected.
  2. Restart the phone.
  3. Reset APN settings if the option is available.
  4. Check for software updates.
  5. Ask your carrier whether manual APN editing is supported.

Do not try to bypass a carrier restriction with unofficial APN apps, rooting tools, or undocumented dialer codes.

Why does my APN disappear after I tap Save?

Usually one of these situations is involved:

  • A required field is missing.
  • The APN value is incorrect.
  • The carrier does not allow that APN.
  • The carrier automatically restores its own configuration.
  • The wrong SIM is being edited.
  • The phone does not support manual APN creation for that carrier.

First verify the APN directly with your carrier.

Do not keep creating slightly different APNs until one happens to work.

Why does my APN reset after an iPhone update?

Apple states that iOS updates can reset manually entered APN changes to the carrier defaults unless the configuration is supplied through a configuration profile.

If this happens:

  1. Check for a carrier settings update.
  2. Confirm the correct APN with your carrier.
  3. Re-enter it only if your carrier permits manual APN editing.
  4. Do not use an APN copied from another carrier.

Can I use APN settings found online?

Only if the information comes directly from the carrier or another official carrier source.

Avoid copying APN values from:

  • Random blogs
  • Forums
  • Social media
  • YouTube comments
  • Another country’s carrier
  • Another carrier
  • Another person’s phone

The same carrier can have different settings for different services, plans, regions, or device configurations.

Apple specifically warns that incorrect APN settings can cause loss of cellular data connectivity and may result in additional charges.

APN settings will not fix every mobile-data problem

An APN is only one part of the cellular connection.

Changing the APN is unlikely to fix:

  • Carrier outages
  • Weak cellular coverage
  • No LTE/4G/5G coverage
  • An inactive data plan
  • Suspended service
  • Exhausted data allowance
  • Damaged SIM
  • Unsupported phone
  • Carrier incompatibility
  • Hardware damage
  • Cellular antenna problems
  • A phone that cannot register on the network

If your APN menu works normally but LTE/4G/5G is missing, use the dedicated LTE troubleshooting guide.

If LTE/4G/5G appears but mobile data does not work, use the mobile-data troubleshooting guide.

When should you contact your carrier?

Contact your carrier if:

  • APN settings are completely missing.
  • APN settings are greyed out.
  • The Add APN button is missing.
  • The Save button is unavailable.
  • A carrier-approved APN will not save.
  • The APN disappears after restarting.
  • The default APN list is empty.
  • A new SIM/eSIM has no correct APN.
  • You recently changed carriers.
  • You recently changed SIM cards.
  • The phone was originally sold by another carrier.
  • Your account may not be provisioned for mobile data.
  • Your carrier requires automatic network configuration.

Ask the carrier to verify the SIM/eSIM provisioning and APN configuration for your exact phone and plan.

Do not factory-reset your phone for an APN problem

  • A factory reset is not a normal solution for a missing, locked, or unsaved APN.
  • A factory reset can erase personal information while leaving the underlying carrier restriction or provisioning problem unchanged.
  • Try the APN reset, SIM checks, carrier verification, and network troubleshooting first.

Common APN mistakes to avoid

Avoid these mistakes:

  • Using another carrier’s APN.
  • Using APN settings from another country.
  • Editing the wrong SIM.
  • Guessing MCC or MNC.
  • Filling fields that your carrier told you to leave blank.
  • Forgetting to select the newly saved APN.
  • Deleting the original APN before recording it.
  • Creating multiple random APNs.
  • Assuming greyed-out means hardware failure.
  • Using unofficial APN-changing apps.
  • Using undocumented dialer codes to bypass restrictions.
  • Factory-resetting the phone unnecessarily.
  • Applying Android instructions to an iPhone.
  • Assuming prepaid and postpaid APN settings are identical.

Quick APN troubleshooting checklist

If you want the shortest possible procedure, follow this order:

  1. Select the correct SIM for mobile data.
  2. Restart the phone.
  3. Turn Airplane Mode on and off.
  4. Open APN settings.
  5. Reset APN to default.
  6. Restart again.
  7. Test mobile data with Wi-Fi turned off.
  8. If the APN is missing, contact the carrier.
  9. If manual APN entry is allowed, get the exact values from the carrier.
  10. Save the APN and make sure it is selected.
  11. If it disappears again, ask the carrier to check mobile-data provisioning.
  12. If APN settings work but mobile data still fails, troubleshoot the broader cellular connection instead.

Frequently Asked Questions

Why is the APN menu missing on Android?

The correct SIM may not be selected, the SIM/eSIM may not be active, or the carrier may manage the APN automatically. Menu availability also varies by manufacturer, Android version, firmware, and carrier.

Why is the APN Add button missing?

Your phone or carrier may not allow manual APN creation. Reset the APN to its carrier default if possible and ask the carrier whether manual APN editing is supported.

Why is my APN greyed out?

The carrier, SIM configuration, firmware, or device-management policy may control the APN. A greyed-out menu does not automatically indicate hardware damage.

Why won’t my APN save?

Check that the APN information exactly matches what your carrier provided. Do not guess missing fields. If the carrier-approved APN still disappears after saving, the carrier may be restricting manual APNs.

Why does my APN disappear after reboot?

The phone may be restoring the carrier’s configuration. Contact the carrier if the manual APN is valid but is automatically removed or replaced.

Does resetting APN settings delete my photos?

No. Resetting the APN restores network configuration and does not normally erase personal photos, apps, contacts, or messages.

Does resetting network settings erase my phone?

No. A network-only reset is different from a factory reset. However, it can remove saved Wi-Fi networks, Bluetooth pairings, and other network settings.

Can I use an APN from another phone?

Not safely as a general rule. APN information is carrier- and service-specific. Get the correct settings from your carrier.

Why are my APN settings missing after changing SIM cards?

The phone may load a different carrier configuration for the newly selected SIM. Select the correct data SIM and check the APN again.

Why did my APN change after an iPhone update?

Apple says iOS updates can reset manually entered APN changes to the carrier defaults unless a configuration profile is being used.

Should I factory-reset my phone because the APN is locked?

No. A factory reset is not a normal fix for a carrier-controlled APN. Contact your carrier first.

Sources and verification

This guide was checked against current official support documentation from Samsung and Apple. Samsung documents the Galaxy APN reset procedure, while Apple documents carrier-controlled APN availability, APN reset behavior, and carrier-settings updates.

Important: APN menus and editing permissions vary by phone model, manufacturer, Android/iOS version, carrier, country, SIM/eSIM, plan, firmware, and device-management policy. Do not treat one phone’s menu path or APN values as universal.

Official Sources

Official sources checked: July 26, 2026

Samsung Singapore

Page: How to set up Access Point Name (APN) on Samsung Mobile?

Direct verified URL: https://www.samsung.com/sg/support/mobile-devices/how-to-set-up-access-point-name-apn-on-samsung-mobile-device/

URL status: Verified accessible on July 26, 2026

Supports:

  • Samsung Galaxy APN menu path
  • Access Point Names location
  • Reset to default procedure
  • Selecting the applicable SIM service

Scope limitation:
The instructions apply to supported Samsung mobile devices. Menu names can differ on older models and other Android manufacturers.

Samsung United Kingdom

Page: What is an APN & how to change mobile network internet settings

Direct verified URL: https://www.samsung.com/uk/support/mobile-devices/how-do-i-check-my-apn-mobile-internet-settings/

URL status: Verified accessible on July 26, 2026

Supports:

  • APN information differs by network operator
  • The carrier should supply the correct APN details
  • Samsung APN menu locations
  • Menu differences by Android version

Scope limitation:
The documented paths apply to Samsung Galaxy devices and include older Android versions.

Apple Support

Page: View and edit your APN on your iPhone and iPad

Direct verified URL: https://support.apple.com/en-us/102483

URL status: Verified accessible on July 26, 2026

Supports:

  • APN editing depends on carrier permission
  • Cellular Data Network menu paths
  • APN changes saving automatically
  • Resetting the APN to carrier defaults
  • Configuration-profile restrictions
  • iOS updates resetting manual APN changes
  • Warning against entering unverified APN values

Scope limitation:
The instructions apply to iPhone and cellular-capable iPad devices. Available options depend on the carrier.

Apple Support

Page: Manually update carrier settings on your iPhone or iPad

Direct verified URL: https://support.apple.com/en-mide/109324

URL status: Verified accessible on July 26, 2026

Supports:

  • Checking for carrier settings updates
  • Carrier update path through Settings and About
  • New SIM and eSIM carrier-configuration requirements
  • Contacting the carrier to verify the installed settings

Scope limitation:
The instructions apply to iPhone and cellular-capable iPad devices.

Samsung Philippines

Page: How to optimize network connectivity

Direct verified URL: https://www.samsung.com/ph/support/mobile-devices/how-to-optimize-network-connectivity/

URL status: Verified accessible on July 26, 2026

Supports:

  • Galaxy software-update checks
  • Reset network settings menu path
  • Warning that menus vary by model and software version

Scope limitation:
The instructions apply to supported Samsung Galaxy devices.

Sony Philippines

Page: How do I enter internet settings manually? (Android 8.0 or lower)

Direct verified URL: https://www.sony.com.ph/electronics/support/articles/SX054601

URL status: Verified accessible on July 26, 2026

Supports:

  • Obtaining the correct APN from the network operator
  • Adding an APN manually
  • Entering Name and APN fields
  • Saving an APN through the menu
  • Carrier-specific APN fields

Scope limitation:
The documented paths apply only to covered Sony Xperia devices running Android 8.0 or earlier. They are not universal instructions for current Android phones.

How This Guide Was Verified

Last technically checked:
July 26, 2026

Research method:
The existing Network Fix and Mobile Data Issues pages were checked for overlapping search intent. The proposed broad APN topic overlapped with the published mobile-data-connected-without-internet guide, so this article was narrowed to missing, locked, and unsaved APN controls. Official Samsung, Apple, and Sony support pages were opened, their page titles were checked, and their procedures were matched to the applicable sections.

Physically tested:
No documentation reviewed.

Applies to:
Android phones, iPhones, and cellular-capable iPads with carrier-managed APN settings.

Important limitation:
APN menus and editing permissions vary by carrier, plan, SIM type, phone manufacturer, operating-system version, firmware, device-management policy, and country.

Data-loss risk:
Conditional. Viewing, selecting, or resetting an APN should not erase personal files. A network-settings reset can remove saved Wi-Fi, Bluetooth, VPN, and mobile-network configuration. Factory reset is not included.

Bottom Line

If your APN settings are missing, locked, greyed out, or not saving, start with the correct SIM and the carrier’s default APN.

For Android:

Correct SIM → APN → Reset to default → Restart → Test

If you must create an APN manually:

Get the exact settings from your carrier → Enter only the required fields → Save → Select the APN → Restart → Test

If the APN menu is missing, locked, or refuses to save a valid carrier-provided configuration, stop changing random settings and contact the carrier. The restriction may be intentional or related to SIM/network provisioning.

For iPhone, APN editing is carrier-dependent. If the APN menu is unavailable, Apple recommends contacting the carrier.

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