Tesco Mobile is a UK mobile network sold through Tesco, run as a joint venture with Virgin Media O2, and it uses the O2 network for coverage. That means a Tesco Mobile problem can come from three places: the shared radio network, Tesco Mobile’s own systems such as accounts and top-ups, or your phone and SIM.
The check above tests tescomobile.com from a remote server. A reachable result means Tesco Mobile’s website, sign-in and help pages are working. It does not measure signal at your location, because the website runs in data centers, not on the masts near you.
Tesco Mobile network status checker
Tesco Mobile publishes a network status checker on its website. Use it to look up your location and see whether there are known issues or planned maintenance on the network there. If a problem is listed, there is little to fix on the phone, and the best step is to wait for the update.
If no problem is listed, the cause is more likely the phone, the SIM, the account or simply indoor coverage. The fix steps below go through those in order.
Fix steps for your phone
- Toggle airplane mode
This forces the phone to search for the network again and clears many stuck data and call sessions.
- Restart the phone
A full restart reloads the SIM and the network settings.
- Check your allowance
Sign in to the Tesco Mobile app or your account online to see whether data, minutes or credit has run out.
- Reseat the SIM
Power off, take the SIM out, check it for damage and put it back. With an eSIM, check that the profile is still enabled in settings.
- Reset network settings
iPhones keep this option in Settings, General, Transfer or Reset iPhone, and Android phones usually list it in Settings, System, Reset options. Saved Wi-Fi passwords are removed.
- Contact Tesco Mobile
The help pages and the @tescomobile account on X are official channels for reporting a problem.
Symptoms and what they usually mean
| What you see | Likely cause | What to try |
|---|---|---|
| No signal anywhere | SIM, account or wider network issue | Run the status checker, reseat the SIM |
| No signal at home, fine outside | Indoor coverage | Use Wi-Fi Calling if your phone supports it |
| Bars showing, no data | Data session or allowance | Toggle airplane mode, check usage |
| Texts not sending | Messaging app or network | Restart the phone, check the status checker |
| App or website will not load | Tesco Mobile web services | Look at the check above, try again later |
Pay as you go and pay monthly
Pay as you go customers sometimes lose service simply because credit has run out or a bundle has expired, which looks a lot like an outage. Checking the balance first saves time. Pay monthly customers can hit the same symptom when a payment has failed. In both cases, the account view in the app shows the answer faster than any network check.
Roaming and travel
Abroad, a Tesco Mobile phone connects through partner networks in the country you are visiting. If calls and data fail after arriving, check that data roaming is switched on in the phone settings and try selecting a different local network manually. Problems abroad usually come from the visited network or phone settings, not from the UK network, so the UK status checker will not show them.
After the 3G switch-off
Some Tesco Mobile complaints that sound like an outage are really about older technology going away. Because Tesco Mobile runs on O2, its 3G service followed O2’s timetable, and O2 began switching off 3G in 2025. Ofcom lists the same timing for the networks that use O2’s masts. A phone without 4G Calling has to fall back to O2’s remaining 2G network for voice, so calls can fail in spots where 4G data still works. Older phones, some tablets and devices bought abroad are the usual suspects.
The cure is 4G Calling, sometimes labelled VoLTE in phone settings. Tesco Mobile explains on its page on Wi-Fi Calling and 4G Calling support which plans and phones can use it. Check that the option is switched on, and that the phone software is up to date, before reporting a fault.
Wi-Fi Calling is the other half. It lets a compatible phone route calls over home broadband, which helps in rooms where the O2 signal is weak. When it is active, a broadband outage at home can make calls fail even though the mobile network is fine, so turning Wi-Fi off for a moment is a quick test.
If only one site or app misbehaves on the phone while calls and texts work, the network is probably not the cause at all. The routine in the guide on sorting a phone-side fault from a wider outage works on mobile data as well as on broadband.
Official Tesco Mobile help
- Tesco Mobile status checkertescomobile.com
- Tesco Mobile Helptescomobile.com
- Tesco Mobile on X@tescomobile
Questions about Tesco Mobile
Which network does Tesco Mobile use?
Tesco Mobile in the UK runs on the O2 network. Tesco Mobile is a joint venture between Tesco and Virgin Media O2, so a wider O2 network problem can also affect Tesco Mobile customers. Tesco's own status checker is still the place to look for your area.
How do I check if there is a Tesco Mobile problem where I am?
Open the network status checker on tescomobile.com, ideally over Wi-Fi if your mobile data is not working. It shows whether there are known issues or planned work affecting the network in the location you check, which tells you if waiting is the only option.
I have signal but my mobile data does not work. What should I do?
Turn airplane mode on for ten seconds and off again, make sure mobile data is enabled, and check that you have data left in your allowance. If you recently changed phone, the data settings may need updating. Restart the phone if nothing changes.
Does this page cover Tesco Mobile Ireland?
No. Tesco Mobile Ireland is a separate operator with its own website and support. This page checks tescomobile.com, the UK service. Irish customers should use the Irish site to check for problems and contact support.
Why do calls drop inside my home but not outside?
Walls, insulation and metal-coated windows block mobile signal. If calls work outdoors, the network is up and the issue is indoor coverage. Wi-Fi Calling, where your phone and plan support it, sends calls over your broadband and usually fixes this.