Why your network data stops working on iPhone (Mobile Data Not Working on iPhone)
| Step | Action | What It Fixes |
|---|---|---|
| 1 | Check your network status | Confirms if issue is network-wide |
| 2 | Toggle aeroplane mode on/off | Re-registers SIM on your network |
| 3 | Restart your phone | Clears temporary network errors |
| 4 | Check your network APN settings | Fixes incorrect data configuration |
| 5 | Re-insert SIM card | Fixes poor SIM contact issues |
| 6 | Contact your network support | Resolves account or SIM faults |
There are several common reasons why your mobile data, calls or texts might stop working. These include an incorrect APN configuration, a temporary network outage in your area, a SIM card that needs re-seating, or a software issue on your device. This guide walks through each possible cause and the fix for each one.
Troubleshooting checklist
Ordered from the fastest fix to the most involved one
Checking your network APN settings on iPhone (Mobile Data Not Working on iPhone)
Before changing any settings, visit the UK APN Hub or check a third-party site like Downdetector to confirm whether there is a known network outage in your area. If the network is down, you simply need to wait for it to restore service — no settings changes will help during an active outage.
Troubleshooting checklist
The fastest checks come first, the deepest fix comes last
Resetting network settings on iPhone for your network (Mobile Data Not Working on iPhone)
Pull down your notification shade and tap Aeroplane Mode to enable it. Wait ten seconds, then tap again to disable it. This forces your phone to drop its current connection and reconnect fresh to the nearest mast. This fixes the majority of temporary signal and data issues.
Troubleshooting checklist
Runs from quick and easy through to the most thorough
Still no data on iPhone — contacting your network support (Mobile Data Not Working on iPhone)
Hold the power button and select Restart. A full restart clears the modem cache and re-registers your SIM on the network. This fixes many data and signal issues that toggling aeroplane mode does not resolve.
Troubleshooting checklist
Begins with the quickest try, finishes with the most complete fix
Step 4 — Re-seat the SIM card (Mobile Data Not Working on iPhone)
Power the phone off, eject the tray with a tool or straightened paperclip, inspect the SIM's gold contacts for dirt, clean gently, then reseat firmly and power on.
Troubleshooting checklist
Fast options lead, thorough ones follow
Step 5 — Check APN settings (Mobile Data Not Working on iPhone)
An incorrect APN is a common cause of mobile data not working even when you have signal. Go to Settings → Mobile Network → Access Point Names and verify the APN values match your network's recommended settings. Visit the UK APN Hub for the correct values, or search this blog for the APN guide for your specific device.
Troubleshooting checklist
The quickest thing to try comes first, the most thorough comes last
Step 6 — Reset network settings for Mobile Data Not Working on iPhone
Android's reset path is Settings → General Management → Reset → Reset Network Settings, restoring APN defaults and clearing Wi-Fi/Bluetooth, apps and data untouched.
On iPhone: Go to Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings. Your iPhone will restart and reconnect with default settings.
Troubleshooting checklist
Sequenced from quick fix to full fix
Step 7 — Contact your mobile network support on iPhone (Mobile Data Not Working on iPhone)
If none of the above steps resolve the issue, contact your network's customer support. There may be a problem with your account, your SIM may need replacing, or there may be a localised network fault. Have your account number and phone IMEI ready (dial *#06# to find your IMEI). Visit the UK APN Hub for contact details.
Troubleshooting checklist
Opens with the fast option, closes with the thorough one