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No Signal on iPhone

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A simple UK guide to No Signal on iPhone, covering setup steps, common causes, fixes, and related your UK network mobile

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Checking UK network coverage maps (No Signal on iPhone)

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 handful of things commonly cause data, calls or texts to fail: incorrect APN settings, a local outage, a SIM needing reseating, or a software glitch. This guide walks through each.

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Troubleshooting checklist

The order matters here, since each fix builds on what came before

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

Network band settings that affect signal (No Signal on iPhone)

Confirm there's no outage nearby via the UK APN Hub or Downdetector before anything else — settings won't help during one.

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Troubleshooting checklist

Follow the sequence — every step assumes the earlier ones were tried

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

SIM tray and SIM card checks for no signal

Enable Aeroplane Mode from the shade for around ten seconds, then disable — the phone reconnects to the nearest mast, resolving most temporary issues.

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Troubleshooting checklist

These fixes stack, so work through them in the order given

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

When no signal points to a network-side issue

Hold the power button for Restart — the resulting reboot clears the modem cache and re-registers the SIM, beyond what aeroplane mode achieves.

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Troubleshooting checklist

Each one picks up from the last, so stick to the sequence

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

Step 4 — Re-seat the SIM card (No Signal on iPhone)

Switch the phone off, open the SIM tray, check the gold contacts for corrosion, clean gently if needed, then reinsert firmly and switch back on.

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Troubleshooting checklist

Don't skip ahead — each fix assumes the previous step was tried first

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

Step 5 — Check APN settings (No Signal on iPhone)

If there's signal but no data, the APN is worth checking against the UK APN Hub's recommended settings.

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Troubleshooting checklist

The list is cumulative; stick to the order for best results

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 No Signal on iPhone

Android's Settings → General Management → Reset → Reset Network Settings brings back the default APN and clears Wi-Fi/Bluetooth, without affecting apps or personal data.

The iPhone reset path (Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings) restores defaults on restart.

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Troubleshooting checklist

Every fix here builds on the last, so keep to the order given

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

Step 7 — Contact your mobile network support on iPhone (No Signal on iPhone)

If the problem persists, customer support is the next step — bring the account number and IMEI, as it could be account, SIM or local network related.

Related guides

SIM Card No Service FixNo Signal on SamsungHow to Fix No Service on PhoneLyca APN Settings iPhoneMMS Not Sending on iPhoneBest APN Settings for RoamingLyca Internet Not Working5G Not Working on Samsung
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Troubleshooting checklist

Each one builds on the last — follow the sequence as given

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

Frequently Asked Questions About No Signal on iPhone

How do I contact your network UK support?
You can contact your network UK customer support through their official website, via live chat, by phone, or through their social media channels.
How do I check my your network signal strength?
Check your phone's signal bars in the status bar. For a detailed reading, go to Settings → About Phone → Status (Android) or dial *3001#12345#* (iPhone) to open Field Test mode.
What should I do if your network has no service?
If your network shows no service, try toggling Aeroplane Mode on and off, restarting your phone, and checking your network coverage map for your area. If the issue persists, contact your network support.
How do I keep my number when switching to your network?
To keep your number when switching to your network, request a PAC code from your current provider by texting 'PAC' to 65075. You can then give this code to your network when you set up your new account.
Does your network support WiFi calling?
Many your network plans support WiFi calling. Check your network account settings or your network website to see if WiFi calling is available on your plan and how to enable it.