How to Order Replacement SIM

What 'SIM not provisioned' means and how to fix it (How to Order Replacement SIM)

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

Publishing order: 435 • Cluster 38: PAYG and SIM Guides

Getting the correct How to Order Replacement SIM | UK Mobile Guide setup can improve mobile data speed, MMS messaging, and network stability on your device.

Setup, connection drops, weak signal and general settings for a UK SIM are addressed here.

Whether it's no service, slow data, a non-sharing hotspot, a blocked SIM, roaming issues or a bad APN, start simple below.

Rebooting typically restores the connection — give it about 30 seconds to settle.

Make sure cellular data and roaming are active and match the tariff's actual inclusions.

The APN can silently get wiped or saved incorrectly — mobile internet settings are worth checking.

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Troubleshooting checklist

Go through in order, since skipping ahead often misses groundwork from earlier steps

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

Registering a new SIM on UK networks (How to Order Replacement SIM)

Check the APN in Mobile Network or Cellular Data settings, save, restart, and confirm data, MMS and hotspot work where relevant.

Internal guides to check next

UK APN Settings Troubleshooting Why Is My Mobile Data Not Working How to Reset APN Settings What Are APN Settings APN Settings Explained What Is eSIM and How It Works How Roaming Works Back to full blog order

Frequently Asked Questions About How to Order Replacement SIM

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.