Quick Answer
When APN settings are missing, locked, greyed out, or will not save, do not copy random APN values from another carrier or country.
First confirm that you selected the SIM used for mobile data. On supported Android phones, reset the APN list to the carrier defaults. On iPhone, the APN menu appears only when the carrier allows users to view or edit it. If the menu remains unavailable or changes will not save, contact the carrier to confirm the correct APN and whether manual editing is permitted.
Table of Contents
Is This the Correct APN Guide?
Use this guide when the problem involves the APN settings screen itself, such as:
- The Access Point Names menu is missing.
- Existing APN entries are greyed out.
- The Add button is unavailable.
- The Save option does not work.
- A newly entered APN disappears.
- APN changes return to their previous values.
- The phone automatically restores the carrier APN.
- The APN menu is visible but cannot be edited.
When the APN menu works normally but the phone shows LTE, 4G, or 5G without internet access, use the separate Mobile Data Connected but No Internet Fix.
That existing guide covers incorrect APN values and general mobile-data failure. This guide focuses specifically on missing, restricted, and unsaved APN settings.
Choose the Symptom That Matches
| What you see | What it may suggest | Next safe step |
| The APN menu is missing on Android | Wrong SIM selected, carrier control, device variation, or no active SIM | Check the active data SIM |
| Existing APNs are greyed out | The carrier, SIM profile, firmware, or administrator may control them | Contact the carrier before editing |
| The Add button is missing | Manual APN creation may not be permitted | Reset defaults and contact the carrier |
| A new APN will not save | Required information may be missing, or editing may be restricted | Verify the exact carrier values |
| The new APN saves but is not selected | Android may still be using another profile | Select the new APN manually |
| APN changes disappear after restarting | The carrier configuration may be restoring its default profile | Ask the carrier whether manual APNs are supported |
| APN settings disappear after changing SIMs | Each SIM can use a different carrier profile | Select the correct SIM and recheck |
| The APN menu is missing on iPhone | The carrier does not permit manual APN editing | Contact the carrier |
| iPhone APN changes reset after an update | iOS may have restored the carrier defaults | Reenter only carrier-approved values |
| Mobile data stopped after editing the APN | One or more values may be incorrect | Reset the APN to default |
A locked or missing APN menu does not by itself prove that the phone is defective.
1-Minute Safe Checks
Complete these checks before manually creating or deleting an APN:
- Turn Wi-Fi off.
- Confirm that a SIM or eSIM is active.
- Make sure Mobile data is enabled.
- On a dual-SIM phone, select the SIM used for mobile data.
- Restart the phone.
- Turn Airplane Mode on for approximately 10 seconds.
- Turn Airplane Mode off.
- Check for a phone software update.
- Confirm that the mobile plan includes active data service.
- Ask the carrier whether an outage or account restriction is present.
- Obtain the exact APN values directly from the carrier.
- Record the current APN settings before changing anything.
Do not change APN fields based on screenshots, forums, social-media posts, or settings copied from another carrier.
Fix 1: Select the Correct Mobile-Data SIM
SAFE FIRST CHECK
Use This When
Use this fix when the APN menu is missing, empty, or displays settings for the wrong carrier on a dual-SIM phone.
Why It May Help
APN settings are associated with a particular SIM and carrier profile. A dual-SIM phone may display different network settings for each SIM.
Android Steps
- Open Settings.
- Tap Network & internet, Connections, SIM cards, or Mobile network.
- Find the default or preferred SIM settings.
- Select the SIM that has the active mobile-data plan.
- Confirm that the SIM is enabled.
- Turn on Mobile data for that SIM.
- Open the selected SIM’s network settings.
- Look for Access Point Names.
- Check whether the correct carrier APN appears.
Expected Result
The APN list should correspond to the carrier attached to the selected mobile-data SIM.
What the Result Means
- If the APN menu appears after selecting the correct SIM, the previous SIM selection was involved.
- If the menu remains missing or locked, the carrier, firmware, SIM profile, or phone model may control the APN settings.
Fix 2: Reset the Android APN to Its Carrier Default
OFFICIALLY DOCUMENTED STEP
Use This When
Use this fix when:
- APN settings were changed manually.
- Mobile data stopped after editing an APN.
- Several duplicate APNs appear.
- The active APN contains unfamiliar information.
- A new SIM was recently installed.
Why It May Help
Resetting the APN removes manual changes and restores the default profiles supplied through the phone, SIM, or carrier configuration.
Samsung documents the following Galaxy path:
Settings → Connections → Mobile Networks → Access Point Names → More options → Reset to default.
Samsung Galaxy Steps
- Open Settings.
- Tap Connections.
- Tap Mobile networks.
- Tap Access Point Names.
- Select the correct SIM when prompted.
- Tap the three-dot menu.
- Tap Reset to default.
- Confirm the reset.
- Restart the phone.
- Turn Wi-Fi off.
- Test mobile data.
Other Android Phones
Search the Settings app for:
- Access Point Names
- APN
- Mobile network
- SIM settings
When a Reset to default option is available:
- Record any custom APN required by your carrier.
- Select Reset to default.
- Restart the phone.
- Wait for the carrier profile to reload.
- Test mobile data.
Do not assume that every Android phone uses the Samsung menu path.
Expected Result
The default APN supplied for the active carrier should return.
What the Result Means
- If mobile data begins working, a manually changed or incomplete APN may have contributed.
- If the APN remains empty, incorrect, or locked, contact the carrier. The phone may not have received the correct carrier configuration.
Fix 3: Obtain the Exact APN From the Carrier
REQUIRED BEFORE MANUAL ENTRY
Use This When
Use this fix when the default APN is missing, the phone uses a new carrier, or the carrier specifically instructed you to enter an APN manually.
Why It May Help
APN details differ by carrier, plan, SIM type, country, and service. Samsung states that APN details vary by network operator and recommends obtaining the specific settings from the operator. Sony likewise instructs users to contact the network operator before manually entering internet settings.
Ask the Carrier For
Request the complete APN profile, including only the fields the carrier requires:
- Profile name
- APN
- Username
- Password
- Proxy
- Port
- MMSC
- MMS proxy
- MMS port
- MCC
- MNC
- Authentication type
- APN type
- APN protocol
- Roaming protocol
- MVNO type and value
Many carriers leave several fields blank. Do not fill empty fields with guessed values.
Verify These Conditions
Before entering the APN, confirm:
- The values apply to your exact carrier.
- They apply to your country or region.
- They apply to your prepaid or postpaid plan.
- They apply to your SIM or eSIM.
- They support mobile data and, when relevant, MMS.
- The carrier permits manual APN editing.
- The instructions are current.
Expected Result
You should have one complete, carrier-approved set of settings rather than several conflicting profiles from unofficial sources.
Fix 4: Add and Save an APN on Android
CONDITIONAL STEP
Use This When
Use this only when the carrier has supplied the exact values and your phone permits manual APN creation.
General Steps
- Open Settings.
- Open the active SIM’s Mobile network settings.
- Tap Access Point Names.
- Tap Add, the plus icon, or New APN.
- Enter the profile name supplied by the carrier.
- Enter the exact APN value.
- Enter only the additional fields required by the carrier.
- Do not change MCC or MNC unless the carrier explicitly instructs you.
- Open the three-dot menu.
- Tap Save.
- Return to the APN list.
- Select the newly created APN.
- Restart the phone.
- Turn Wi-Fi off.
- Test mobile data.
Sony’s official instructions for supported older Xperia software show that the APN must be entered under Access Point Names and saved through the three-dot menu. That exact path is limited to Android 8.0 or earlier on the covered Sony devices and should not be treated as universal current Android behavior.
Expected Result
The new APN should appear in the list and remain selected after leaving the settings screen.
What the Result Means
The APN appears and mobile data works:
The previous carrier profile may have been missing or incorrect.
The APN saves but is not active:
Return to the list and select its radio button or profile name.
The APN disappears immediately:
A required value may be missing, or the carrier configuration may not permit that profile.
The Save button is unavailable:
Manual APN editing may be restricted, or the phone may require additional carrier-supplied information.
Do not create multiple slightly different APNs and test them randomly.
Fix 5: Check Why the Android APN Menu Is Missing or Locked
DIAGNOSTIC TEST
Use This When
Use this fix when Access Point Names is missing, greyed out, or cannot be changed.
Check the Following
- Confirm that a SIM or eSIM is active.
- Confirm that the correct SIM is selected.
- Make sure Airplane Mode is off.
- Turn on Mobile data.
- Restart the phone.
- Check for a software update.
- Search Settings for APN or Access Point Names.
- Ask the carrier whether it automatically manages the APN.
- Ask whether manual APN editing is disabled for your plan or device.
- Ask whether the SIM needs to be reprovisioned.
- Confirm that the phone is compatible with the carrier.
- Check whether the phone is managed by an employer or organization.
Available mobile-network controls vary by carrier, phone model, software version, and SIM configuration. A missing menu is therefore not enough to diagnose hardware failure.
What to Do When the Carrier Controls the APN
Ask the carrier to:
- Confirm the APN attached to your account.
- Resend the network configuration when supported.
- Refresh mobile-data provisioning.
- Confirm that the SIM or eSIM is active.
- Confirm that the device is approved for its network.
- Replace or reprovision the SIM when necessary.
Do not root the phone, install hidden-settings applications, or use undocumented dialer codes to bypass an APN restriction.
Fix 6: Fix an APN That Will Not Save
CONDITIONAL STEP
Use This When
Use this fix when you tap Save but the new APN does not appear or disappears after restarting.
Steps
- Reopen the APN editor.
- Confirm that the Name field is not blank.
- Confirm that the APN field exactly matches the carrier’s value.
- Remove accidental spaces before or after each value.
- Check capitalization only when the carrier says it matters.
- Enter the exact APN type supplied by the carrier.
- Leave unspecified fields blank.
- Do not guess MCC, MNC, authentication, protocol, or MVNO values.
- Tap the three-dot menu.
- Tap Save.
- Return to the APN list.
- Select the new profile.
- Restart the phone.
- Check whether the profile remains selected.
If It Still Will Not Save
Contact the carrier and provide:
- Phone manufacturer and exact model number
- Android version
- SIM or eSIM type
- Carrier and plan
- Screenshot of the APN page
- Exact values you were instructed to enter
- Whether Save is missing or the profile disappears
The result does not prove that Android storage is corrupted. Carrier restrictions and SIM-provisioning rules can produce the same behavior.
Fix 7: Fix Missing or Locked APN Settings on iPhone
OFFICIALLY DOCUMENTED STEP
Use This When
Use this when Cellular Data Network or Mobile Data Network is missing, or the APN fields cannot be edited on an iPhone.
Why It May Help
Apple states that users can view or edit the APN only when their carrier permits it. When the APN option is missing or cannot be changed, Apple directs users to contact the carrier.
Check the APN Menu
Depending on region and iOS wording, open one of these paths:
Settings → Cellular → Cellular Data Network
or:
Settings → Mobile Data → Mobile Data Options → Mobile Data Network
If neither option appears, contact the carrier.
When the Menu Is Available
- Obtain the exact APN from the carrier.
- Open the APN menu.
- Enter only the carrier-approved values.
- Leave unspecified fields blank.
- Return to the previous screen.
Apple states that supported APN changes save automatically on iPhone and iPad. Depending on the carrier, the settings may still be unavailable or unchangeable.
Reset the iPhone APN
When Reset Settings is available:
- Open Settings.
- Tap Cellular.
- Tap Cellular Data Network.
- Tap Reset Settings.
- Wait for the carrier defaults to return.
- Restart the iPhone.
- Test cellular data.
A configuration profile installed by an employer, school, carrier, or mobile-device administrator may control the APN.
Important Update Limitation
Apple states that an iOS update can reset manually entered APN changes to the carrier defaults unless a configuration profile is being used. Reenter the APN only after confirming the correct values with the carrier.
Fix 8: Check for an iPhone Carrier Settings Update
OFFICIALLY DOCUMENTED STEP
Use This When
Use this after installing a new SIM or eSIM, changing carriers, or noticing that the APN or cellular configuration changed.
Steps
- Connect the iPhone to Wi-Fi or a working cellular connection.
- Open Settings.
- Tap General.
- Tap About.
- Wait for a carrier update prompt.
- Follow the onscreen instructions if an update is offered.
- Restart the iPhone.
- Test cellular data.
Apple states that a new SIM or eSIM may require downloading settings for the new carrier. The carrier can confirm whether the latest carrier settings are installed.
Expected Result
The iPhone should use the current network configuration supplied for the carrier.
What the Result Means
If the APN menu remains unavailable after the carrier update, manual editing may not be supported.
Fix 9: Reset Mobile Network Settings
CONDITIONAL STEP
Use This When
Use a network reset only after:
- The correct SIM is active.
- The carrier has confirmed the correct APN.
- Resetting the APN itself did not help.
- The account and plan are active.
- A carrier outage has been ruled out.
Before Resetting
Read the warning displayed by the phone. Depending on the manufacturer, a network reset can remove:
- Saved Wi-Fi networks
- Wi-Fi passwords
- Bluetooth pairings
- Mobile-network settings
- Manually entered APNs
- VPN or other connection settings
It should not erase personal photos, messages, or installed apps when a network-only reset is selected.
Samsung Galaxy Steps
- Open Settings.
- Tap General management.
- Tap Reset.
- Tap Reset network settings or Reset mobile network settings.
- Read the warning.
- Tap Reset settings.
- Confirm the reset.
- Restart the phone.
- Check whether the default APN returns.
Samsung documents this network-reset path while noting that menu names can vary by model and software version.
Other Android Phones
Search Settings for:
- Reset mobile network
- Reset network settings
- Reset Wi-Fi, mobile and Bluetooth
Use the manufacturer’s official instructions for the exact phone model.
Expected Result
The phone should rebuild its mobile-network configuration and retrieve available carrier defaults.
What the Result Means
If the APN remains missing or locked, repeatedly resetting the phone is unlikely to help. Contact the carrier or device manufacturer.
When Incorrect APN Values Are the Main Problem
Incorrect APN configuration becomes more plausible when:
- Mobile data stopped immediately after manual editing.
- The phone shows LTE, 4G, or 5G but cannot load anything.
- The problem began after switching carriers.
- Mobile data stopped after inserting a replacement SIM.
- The correct carrier APN is missing.
- Resetting to the carrier default restores internet access.
Use the Mobile Data Connected but No Internet Fix for the complete mobile-data troubleshooting sequence.
When APN Editing Will Not Fix the Problem
APN changes are unlikely to solve:
- Weak cellular signal
- Missing LTE coverage
- Carrier outages
- An inactive mobile plan
- Exhausted data allowance
- A suspended account
- An incompatible phone
- A carrier-locked device used with another network
- A damaged SIM
- A phone with no cellular service
- Hardware damage after a drop or liquid exposure
Use the LTE Not Working on Android Fix when LTE or 4G itself is missing.
When to Contact the Carrier
Contact the carrier when:
- The APN menu is missing or greyed out.
- Manual APN creation is blocked.
- The supplied APN will not save.
- The default APN list is empty.
- APN changes are automatically reversed.
- A new SIM or eSIM has no working carrier profile.
- The phone is imported or was originally sold by another carrier.
- The account may not be provisioned for mobile data.
- The carrier requires a configuration profile.
- The correct settings differ between prepaid and postpaid service.
The carrier controls the network configuration, plan provisioning, and official APN values.
Common Mistakes
- Copying APN settings from an unofficial website.
- Using settings for another country or carrier.
- Editing the APN for the wrong SIM.
- Changing MCC or MNC without carrier instructions.
- Filling every field even when the carrier says to leave it blank.
- Forgetting to select the new APN after saving.
- Deleting every default APN before recording the original settings.
- Assuming a greyed-out APN means the phone is damaged.
- Using hidden-menu apps or undocumented dialer codes.
- Resetting the entire phone for a carrier-controlled setting.
- Entering Android APN instructions on an iPhone.
- Assuming the same APN works for prepaid and postpaid plans.
Frequently Asked Questions
Why is the APN menu missing?
The phone may not have an active SIM, the wrong SIM may be selected, or the carrier may manage the APN automatically. On iPhone, Apple states that the menu is available only when the carrier allows APN viewing or editing.
Why are my APN settings greyed out?
The carrier, SIM configuration, phone firmware, or device-management policy may control the settings. Contact the carrier before attempting to bypass the restriction.
Why does my new APN disappear after I tap Save?
A required field may be missing, an entered value may be invalid, or the carrier may prevent unsupported profiles. Verify every value with the carrier.
Does resetting the APN delete personal data?
Resetting the APN restores carrier network values. It should not erase personal photos, apps, contacts, or messages.
Why does my APN reset after an iPhone update?
Apple states that iOS updates can reset manually entered APN changes to their default values unless the APN is provided through a configuration profile.
Can I use APN values found online?
Use only values published or directly supplied by your carrier. Incorrect settings can disable mobile data, interfere with MMS, or cause unexpected carrier charges.
Should I factory-reset the phone?
No. A factory reset is not a normal solution for missing or locked APN controls. It can erase personal data without removing a carrier restriction or correcting account provisioning.
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.
Related Guides
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.
Final Steps
- Start by selecting the correct mobile-data SIM and resetting the APN to its carrier default when that option is available.
- Create a manual APN only with exact values supplied by the carrier. If the APN menu is missing, locked, or refuses to save valid settings, contact the carrier rather than using unofficial values or bypass tools.
- When APN controls work normally but mobile data still has no internet access, continue with the dedicated mobile-data troubleshooting guide.