# How to Fix a SIM Card That Has Stopped Working (UK)
> Your Vodafone SIM has stopped working? Try removing the SIM tray, powering off your phone, and restarting after five minutes. Full troubleshooting guide for May 2026.
**Published:** 2026-05-10
**Updated:** 2026-05-29
**Category:** REF_TELCO
**Author:** Rafael Tuñón
**Canonical URL:** https://rechargevodafone.co.uk/why-has-my-sim-card-stopped-working-uk/
## Key takeaways
- Try the basic restart method: remove your SIM tray, power off your phone, and wait five minutes before restarting to resolve many Vodafone SIM issues.
- Check your iPhone settings by going to Settings → Mobile Service to confirm your Vodafone SIM is listed as active on your device.
- Navigate to Network Selection in your phone's settings, as this is a common troubleshooting step for Vodafone SIM connectivity problems.
- Visit your nearest Vodafone store in person if your SIM stopped working after switching to a new phone, as staff can diagnose network compatibility issues.
## Article
If your Vodafone SIM card has suddenly stopped working, showing 'No Service' or 'SIM error', several factors could be the cause. The issue could be a temporary network problem, a misconfigured setting on your device, a fault with the SIM card itself, or an account-related issue. This guide provides a comprehensive, step-by-step approach to diagnosing and resolving the problem, using official guidance from UK sources.
- **Initial Checks**: The most common fixes are often the simplest. Start by restarting your phone and checking for local network outages on Vodafone's official status page.
- **Physical Inspection**: Carefully remove, clean, and reseat your SIM card to rule out poor contact with your device.
- **Device vs. SIM**: Test the SIM in a different, unlocked phone. If it works, the issue is likely with your handset. If it fails in both, the SIM card is probably faulty.
- **Account Status**: For Pay As You Go customers, a SIM can be deactivated after 180 days of inactivity. Ensure your account is active and in good standing.
- **Replacement**: If the SIM is confirmed as faulty, you can get a replacement by visiting a Vodafone store, ordering online, or calling customer support.
## Step 1: Perform Basic Troubleshooting
Before diving into more complex solutions, execute these preliminary checks. They resolve a majority of common SIM card issues.
### 1. Restart Your Device
A full restart can resolve many temporary software glitches that may prevent your phone from connecting to the network. Power your phone off completely, wait for at least one minute, and then turn it back on. This forces the device to establish a fresh connection to the Vodafone network.
### 2. Check for Network Outages
Sometimes the problem is not with your phone or SIM, but with the network itself. Vodafone provides a real-time [Network Status Checker](https://www.vodafone.co.uk/network/status-checker) where you can enter your postcode to see if there are any known service issues or planned maintenance in your area. You can also access this tool via the My Vodafone app. If there is a local outage, you will need to wait for the service to be restored.
### 3. Toggle Aeroplane Mode
Turning Aeroplane Mode on for 30 seconds and then off again is another quick way to force your phone to re-scan and reconnect to available mobile networks.
## Step 2: Inspect the Physical SIM Card
If the basic resets do not work, the issue may be with the physical SIM card or its connection to your phone.
**How to Reseat Your Vodafone SIM Card**
1. **Power Off**: Completely switch off your mobile phone.
2. **Locate and Open the SIM Tray**: Use a SIM ejector tool (or a small paperclip) to open the SIM card tray on the side of your device.
3. **Remove and Inspect**: Carefully take the SIM card out of the tray. Check for any visible signs of damage, such as scratches or cracks. Wipe the gold contact area gently with a clean, dry, and lint-free cloth to remove any dust or grime.
4. **Reseat and Reinsert**: Place the SIM card back into the tray, ensuring it is aligned correctly. Insert the tray firmly back into the phone.
5. **Power On**: Turn your phone back on and wait a few minutes to see if it registers the SIM and connects to the network.
## Step 3: Verify Phone Settings
Incorrect device settings can prevent your SIM from connecting, even if it is working correctly.
* **Network Selection**: Ensure your phone's network selection is set to 'Automatic'. On an iPhone, go to `Settings > Mobile Service > Network Selection`. On Android, this is typically under `Settings > Network & Internet > SIMs > Vodafone`. A manual selection might prevent connection if the chosen network is unavailable.
* **Check for Locked Device**: If you have recently switched to Vodafone from another provider, your handset might be locked to the previous network. You will need to contact your old provider to request a Network Unlock Code (NUC).
## Step 4: Isolate the Fault (SIM or Handset?)
To determine whether the fault lies with the SIM card or your phone, try inserting the Vodafone SIM into a different, unlocked handset.
* **If the SIM works in another phone**: The problem is likely with your original device. You may need to check for software updates or perform a factory reset (after backing up your data). Contacting your phone's manufacturer for support would be the next step.
* **If the SIM does not work in another phone**: This strongly indicates the SIM card itself is damaged, faulty, or has been deactivated. In this case, you will need a replacement.
## Understanding SIM Deactivation
For Pay As You Go customers, a SIM card can be permanently disconnected if it is not used for a chargeable activity,such as making a call, sending a text, or using data,at least once every 180 days. Vodafone sends a warning text after 90 days of inactivity. Once disconnected, the number cannot be reactivated and you will need a new SIM.
## How to Get a Replacement Vodafone SIM
If you have determined your SIM card is faulty or lost, obtaining a replacement is straightforward. You can keep your existing number, which will be transferred to the new SIM during a process called a 'SIM swap'.
There are three main ways to get a replacement SIM:
1. **Visit a Vodafone Store**: This is often the quickest method. You will need to bring a form of photo ID (like a passport or driver's license). Store staff can provide a new SIM and help you activate it.
2. **Order by Phone**: You can call Vodafone to request a new SIM. The number is **191** from a Vodafone mobile or **0333 3040 191** from any other UK phone. The new SIM is typically delivered in two to three working days.
3. **Order Online**: You can request a new SIM for free via the Vodafone website.
Once your new SIM arrives, you will need to activate it. This process, often called a 'SIM swap', moves your number and plan to the new card. Activation is usually quick but can take up to 24 hours during busy periods.
## Troubleshooting an eSIM
For users with an eSIM, the troubleshooting steps are different as there is no physical card. Common issues stem from incomplete activation or incorrect settings.
* **Check Connectivity**: A stable Wi-Fi connection is required to download and activate an eSIM profile.
* **Enable Data Roaming**: If you are abroad, ensure Data Roaming is enabled for your eSIM profile in your phone's settings.
* **Reinstall the Profile**: If problems persist, you may need to remove the eSIM profile from your device and reinstall it by scanning the original QR code provided by Vodafone.
* **Contact Support**: If activation fails, contact Vodafone support, as your account may not be correctly provisioned for an eSIM.
**Q1: How long does it take to activate a new Vodafone SIM?**
A1: Activation is usually much faster, but can take up to 24 hours in some cases.
**Q2: Will I lose my credit if my Pay As You Go SIM is deactivated?**
A2: Yes. If your Pay As You Go SIM is disconnected after 180 days of inactivity, you will lose your number and any remaining credit.
**Q3: What is a PUK code and when do I need it?**
A3: A PUK (Personal Unlocking Key) code is needed if you enter your SIM PIN incorrectly three times. You can get your PUK code by calling Vodafone. Entering the wrong PUK code 10 times will permanently block your SIM, requiring a replacement.
**Q4: Can I get a replacement SIM if my phone was lost or stolen?**
A4: Yes. You should report your phone as lost or stolen to Vodafone immediately. They will block the old SIM to prevent unauthorised use and help you arrange a replacement.
**Q5: What should I do if I am still having problems?**
A5: If you have followed all the troubleshooting steps and your service is still not working, you should contact Vodafone customer support directly. You can call them on 191 from a Vodafone phone or 0333 304 0191 from another line. Alternatively, you can seek advice from an independent body like Citizens Advice.
## Quotations
> My son changed phone a while back, SIM card wouldn't work in the new phone. A little troubleshooting
>, Anonymous user (r/Vodafone, Reddit) (https://www.reddit.com/r/Vodafone/comments/1malwup/my_sim_card_doesnt_work/)
## Frequently asked questions
### why has my Vodafone SIM stopped working
Your Vodafone SIM may have shifted in the tray, your phone needs to re-register on the network, or a settings issue is blocking the connection. Most cases fix themselves within five minutes by removing the SIM tray, cleaning the card, reseating it, powering off your phone completely, and waiting five minutes before restarting.
### how to fix Vodafone SIM not working after changing phones
Remove the SIM tray completely and check the card for scratches or grime, then reseat it carefully. Power your phone off fully and wait five minutes before switching it back on-this longer power-off forces the modem to reconnect from scratch, which often resolves the issue after a phone change.
### how do I check if my Vodafone SIM is active on iPhone
Go to Settings, then tap Mobile Service to see if your Vodafone SIM appears with a green active status. If it shows as inactive or missing, reseat the SIM card first. Also check Network Selection in the same menu and switch it to Automatic if it is set to a specific carrier.
### Vodafone SIM not showing in network selection
Navigate to Settings → Mobile Service on your iPhone to confirm the Vodafone SIM is listed as active, then go to Network Selection and ensure it is set to Automatic rather than a specific carrier. If the SIM still does not appear after reseating it and waiting five minutes, visit a Vodafone store for a replacement.
### what should I do if Vodafone SIM still doesn't work after troubleshooting
If reseating the SIM, checking iPhone settings, and waiting five minutes do not resolve the issue, visit a Vodafone store in person for the fastest route to a replacement SIM card.
## Sources
1. [Vodafone sim stopped working, fixed with battery reset - Facebook](https://www.facebook.com/groups/mahindraxuv700owners/posts/1326354054932613/) (www.facebook.com)
2. [Vodafone SIM Not Working on iPhone? Expert Help & Fixes](https://www.justanswer.com/smartphones/t99ja-vodafone-sim-no-internet-iphone16-pro.html) (www.justanswer.com)
3. [My SIM card doesn't work : r/Vodafone - Reddit](https://www.reddit.com/r/Vodafone/comments/1malwup/my_sim_card_doesnt_work/) (www.reddit.com)
4. [How to Fix Vodafone SIM Network not Showing Problem ... - YouTube](https://www.youtube.com/watch?v=4GtaGBsond8) (www.youtube.com)