O2 Outage Report in Cardiff, Wales
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The latest reports from users having issues in Cardiff come from postal codes CF11 and CF37.
O2 is the commercial brand of Telefónica UK Limited offering mobile phone and mobile internet service, including voicemail and SMS. With over 25 million customers, O2 runs 2G, 3G and 4G networks across the UK. O2 previously offered home broadband service.
Full Outage Map
E-mailProblems in the last 24 hours in Cardiff, Wales
The chart below shows the number of O2 reports we have received in the last 24 hours from users in Cardiff and surrounding areas. An outage is declared when the number of reports exceeds the baseline, represented by the red line.
At the moment, we haven't detected any problems at O2. Are you experiencing issues or an outage? Leave a message in the comments section!
Most Reported Problems
The following are the most recent problems reported by O2 users through our website.
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Phone (50%)
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Internet (27%)
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Total Blackout (14%)
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Wi-fi (4%)
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E-mail (4%)
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TV (1%)
Live Outage Map Near Cardiff, Wales
The most recent O2 outage reports came from the following cities: Cardiff, Cwmbran Central, Newport and Pontyclun.
| City | Problem Type | Report Time |
|---|---|---|
 Cardiff |
Phone | |
| Newport |
Internet | |
| Cardiff |
Phone | |
| Cardiff |
Phone | |
| Cardiff |
Internet | |
| Pontyclun |
Phone |
Community Discussion
Tips? Frustrations? Share them here. Useful comments include a description of the problem, city and postal code.
Beware of "support numbers" or "recovery" accounts that might be posted below. Make sure to report and downvote those comments. Avoid posting your personal information.
O2 Issues Reports Near Cardiff, Wales
Latest outage, problems and issue reports in Cardiff and nearby locations:
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Dai Smash/DavidDoran
(@DaiSmashie) reported
from
Cwmbran Central, Wales
@O2 why are you offering free Samsung products when you take out a new contract then @SamsungUK won't accept the contract, emails and receipts as proof of purchase? Disgusting customer service from @SamsungUK
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anthony davies 🇾🇪🔰🏴🇺🇦
(@acdavies67) reported
from
Barry, Wales
Well I've gotta be honest,never again will I take another phone contract out with @O2,wherever I go in a 50 mile radius of my home,my signal is **** and they called me last week offering me more data,more data ?,*******, i can't get anywhere near my data limit now ffs 😡😡😡😡
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Dani 💋
(@92danielleyoung) reported
from
Alway, Wales
What’s up with @O2 gone down before anyone can even get Peter Kay tickets 🤬🤬🤬🤬
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Charlie Balcombe
(@CharlBalcombe) reported
from
Cardiff, Wales
@O2 hello! I forgot to put my UNiDAYS on when purchasing my new phone contract and I’m struggling to add it on after, is it possible you could help me with that please? :-(
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Dave South
(@davesouthphoto) reported
from
Cardiff, Wales
If I had a £1 for eveytime @O2 text me about my local mast being down. I wouldn't have to pay for my contract anymore. Wearing thin now guys.... 🙄
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Sarah
(@sarlpar) reported
from
Henllys, Wales
@O2 It’s been going on for months, I have friends dotted around NP44 and they all struggle making phone calls as they keep dropping out, it’s not something new it’s an ongoing issue. I’d change if I wasn’t tied in and I think you’ll find other would too if they could. So frustrating
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Sarah
(@sarlpar) reported
from
Henllys, Wales
@O2 your coverage in the Cwmbran area NP44 is shocking, no end of people on O2 post about the poor signal especially around the Llanyrafon and Henllys/TyCanol area. When we ask about if there are any signal issues we’re told there’s not, Vodafone, EE and 3 work prefect. 😖
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Super Blue Eye Dog
(@BigDogWrestler) reported
from
Cardiff, Wales
How can @O2 sponsor the World's most popular concert venue as in @TheO2 but can't give me a decent signal for 50% of my day?
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Eugene O’Carroll
(@bigjeans68) reported
from
Langstone, Wales
Shocking signal today on o2 postcode NP18 1NF @O2 @mrsclart
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Simon 💉💉💉🐉
(@uncriticalsimon) reported
from
Newport, Wales
@jasonmackenzie @O2 OK I once had trouble with EE (not for the mobile service but when I switched to broadband), it got so bad that I decided to go back to Sky. (NB now with TalkTalk, also not great for customer service but OK if nothing goes wrong.)
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🌈 Champ
(@BigDogWrestler) reported
from
Cwmbran Central, Wales
@O2 why is my signal often very poor and I mean often and very very poor?
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Kathryn
(@tweetkattweet) reported
from
Weston-super-Mare, England
@O2 hi, I’ve been waiting for a SIM card to be delivered for over a week, tried speaking to your support people who wanted the code they’d sent to the phone which I couldn’t give them as I don’t have the phone! So frustrating
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Rich!!
(@rich_t1977) reported
from
Weston-super-Mare, England
@O2 Poor customer service again!!! Can’t get hold of anyone and just going round in circles on there so called, help, pages!!!
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MH 🏴🏳️🌈🇪🇺 #yescymru
(@cymboi) reported
from
Victoria, Wales
@O2 How is that great value for a customer, when a sim only package is £30, yet its £35 when you purchase it with a phone?
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Adam Smith #BlackLivesMatter
(@Taxiboi3583) reported
from
Beechwood, Wales
@O2 Totally ignored my actual question, do I get a rebate on my bill if I experience technical issues?
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Daniel Lyddon
(@Daniel_Lyddon) reported
from
Cardiff, Wales
(4/4) ...as being the fault of an automated system, without any recompense or any attempt to suggest that they can improve, is horrifying. I feel almost constantly threatened, intimidated, and abused by @O2 due to an issue that they caused, and they are making no attempt to fix.
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Daniel Lyddon
(@Daniel_Lyddon) reported
from
Cardiff, Wales
(2/4) ...from @o2 dated TWO DAYS after the issue was, I was told, cleared up. A call to #O2 #AccessForYou this afternoon shows the issue is cleared up and the letters are auto-generated because payments can take up to 48hrs to register with O2...
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Daniel Lyddon
(@Daniel_Lyddon) reported
from
Cardiff, Wales
(1/4) Not a week after I was horrifically abused by an @o2 #CustomerServices agent, and even after I settled the payment issue (ongoing problems with #O2 automated systems since last Aug/Sep) that very day, I have today received three consecutive threatening/#legal letters...
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Daniel Lyddon
(@Daniel_Lyddon) reported
from
Cardiff, Wales
30 mins on hold to @O2 customer services, spoke to an agent who has now put me on hold to speak to transfer me to #CustomerServices...so God knows who the hell I got through to 🙄😡 #FirstWorldProblems
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Daniel Lyddon
(@Daniel_Lyddon) reported
from
Cardiff, Wales
If it wasn't for all the free benefits I got with @O2 Priority, I'd ditch them. Their #CustomerService is abysmal. It's like being in some weird kind of abusive relationship: "we'll treat you like **** but give you lots of free stuff so you'll want to stay with us" 🙄😡
O2 Issues Reports
Latest outage, problems and issue reports in social media:
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David H
(@davidhblandy) reported
@O2 Just received an email telling me you’re turning 3G off in Guildford. Only problem is the 5G you say is there doesn’t work and 4G isn’t available (replaced by the 5G that doesn’t work). So what do you suggest an O2 customer does in Guildford.
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David Roughley
(@Roughman01) reported
@O2 Just a shame your network Barely works in the UK 😡 I can't use my data or log into my account!!!!
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Natasha
(@n_whitton92) reported
@O2 my phones been on satellite/no signal all day. Checked all settings they’re as they should be. How can I fix this?
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GENTOO
(@GGGENTOO) reported
@REDDOC98 @ARMIGCE @O2 Same! It’s been a week now. Did you find a fix?
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Fred
(@fred6279) reported
@KyleTSpence @MartinSLewis @O2 Their prices are horrible though, and their Giffgaff MVNO has worse speeds than proper O2 unlike ID Mobile/Voxi which are just as fast as Three/Vodafone.
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suavito
(@selectasuave) reported
@o2 3G signal in a city in 2025 is crazy btw… please sort it out.
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L Brown
(@dompyone) reported
@O2 shockingly slow mobile internet at Brent Cross, not even busy!
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Tasha22 🏴
(@tassja83) reported
@O2 I’ve been contacting O2 since the 20/06/25 because my phone won’t connect to mobile data or Wi-Fi. After numerous calls with customer service I’m still no closer to getting it resolved. Customer service tells me they’ll call at specific times & don’t bother calling &
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Emma_ld
(@Emmald14) reported
@O2 the blue Monday play now button is not working?
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Lily Jones Wong
(@lwong6053) reported
@O2 reception very poor at Wimbledon. Not good.