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Why Is My Mobile Data Not Working

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A updated UK guide to Why Is My Mobile Data Not Working, covering setup steps, common causes, fixes, and related your UK

Why Is My Mobile Data Not Working guide thumbnail

Fixing mobile data stops after a phone update

Step Action What It Fixes
1Check your network statusConfirms if issue is network-wide
2Toggle aeroplane mode on/offRe-registers SIM on your network
3Restart your phoneClears temporary network errors
4Check your network APN settingsFixes incorrect data configuration
5Re-insert SIM cardFixes poor SIM contact issues
6Contact your network supportResolves account or SIM faults

A few things commonly cause data, calls or texts to fail: incorrect APN settings, an area outage, a SIM needing reseating, or a software glitch. This guide covers each cause and fix.

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Troubleshooting checklist

These are sequenced — most cases clear up by the second step

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

Flushing the network cache (Why Is My Mobile Data Not Working)

Rule out a local outage first via the UK APN Hub or Downdetector. During an active outage, no setting change helps — it's simply a case of waiting for service to come back.

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Troubleshooting checklist

Try them top-down; step two catches the majority of cases

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

Testing data with another SIM or network (Why Is My Mobile Data Not Working)

Toggle Aeroplane Mode from the notification shade for about ten seconds. This makes the phone reconnect to the nearest mast, resolving most temporary signal and data issues.

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Troubleshooting checklist

Sequential order works best here — most resolve within two steps

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

Last resort: factory reset network settings (Why Is My Mobile Data Not Working)

Hold power and choose Restart for a full reboot, which clears the modem cache and re-registers the SIM, fixing what aeroplane mode can't.

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Troubleshooting checklist

Move through these one by one; two steps is usually enough

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

Step 4 — Re-seat the SIM card (Why Is My Mobile Data Not Working)

Switch the phone off, eject the SIM tray with a tool or paperclip, take out the card, and check the gold contacts for dirt — clean gently and reseat firmly before restarting.

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Troubleshooting checklist

Follow the list in order — the fix is typically an early one

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

Step 5 — Check APN settings (Why Is My Mobile Data Not Working)

Signal but no data usually means a bad APN. Verify it under Settings → Mobile Network → Access Point Names against the recommended settings, available on the UK APN Hub.

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Troubleshooting checklist

Work top to bottom; most people are done after step two

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data
!
Reset Network Settings will delete all saved Wi-Fi passwords
This step also removes all Bluetooth pairings and VPN profiles. Make a note of your Wi-Fi passwords before continuing. Only use this as a last resort after all other steps have failed.

Step 6 — Reset network settings for Why Is My Mobile Data Not Working

Android's Settings → General Management → Reset → Reset Network Settings restores default APN and clears Wi-Fi/Bluetooth, leaving apps and data untouched.

For iPhone, a reset via Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings restores default settings on restart.

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Troubleshooting checklist

These build on each other — try them in the order given

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

Step 7 — Reach out to customer support for data issues

If nothing above works, get in touch with customer support. Bring your account number and IMEI; it may be an account, SIM or local network problem.

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Lyca Internet Not WorkingMobile Data Not Working on iPhoneMobile Data Not Working on AndroidLyca APN Settings iPhoneMMS Not Sending on iPhoneBest APN Settings for Roaming5G Not Working on SamsungSIM Card No Service Fix
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Troubleshooting checklist

Take it step by step, since most fixes land early in the list

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

Frequently Asked Questions About Why Is My Mobile Data Not Working

Why is your network mobile data not working?
your network mobile data may stop working due to an incorrect APN, a temporary network outage, an expired data plan, or a SIM issue. Follow the steps in this guide to identify and fix the cause.
How do I reset my your network APN settings?
On Android: go to Settings → Network → Mobile Networks → Access Point Names, then tap the menu and select 'Reset to default'. On iPhone: go to Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings.
Does your network have a network outage in my area?
Check your network website or their social media channels for real-time outage information. You can also check third-party sites like Downdetector for user-reported your network outages.
Why does your network show signal but no internet?
If your network shows signal but no internet, the APN settings may be incorrect or missing. Check the APN settings on your device and compare them to the correct your network values in our APN guide.
How long does a your network outage usually last?
Most your network outages are resolved within a few hours. For planned maintenance, your network usually notifies customers in advance. Check your network status page for current updates.