O2

O2 Outage Report in Treharris, Merthyr Tydfil County Borough, Wales

No problems detected

If you are having issues, please submit a report below.

The latest reports from users having issues in Treharris come from postal codes CF46.

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.

Problems in the last 24 hours in Treharris, Wales

The chart below shows the number of O2 reports we have received in the last 24 hours from users in Treharris and surrounding areas. An outage is declared when the number of reports exceeds the baseline, represented by the red line.

O2 Outage Chart in Treharris, Merthyr Tydfil County Borough, Wales 02/25/2026 00:00

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.

  1. Phone (51%)

    Phone (51%)

  2. Internet (30%)

    Internet (30%)

  3. Total Blackout (12%)

    Total Blackout (12%)

  4. E-mail (4%)

    E-mail (4%)

  5. Wi-fi (3%)

    Wi-fi (3%)

  6. TV (%)

    TV (%)

Live Outage Map Near Treharris, Merthyr Tydfil County Borough, Wales

The most recent O2 outage reports came from the following cities: Treharris, Cathays and Cardiff.

Loading map, please wait...
City Problem Type Report Time
United KingdomTreharris Phone
United KingdomCardiff Phone
United KingdomCardiff Phone
United KingdomBridgend Phone
United KingdomBridgend Phone
United KingdomPorth 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 Treharris, Wales

Latest outage, problems and issue reports in Treharris and nearby locations:

  • BigDogWrestler 🌈 Champ (@BigDogWrestler) reported from Cwmbran Central, Wales

    @O2 why is my signal often very poor and I mean often and very very poor?

  • ChrisEddy_7 Eddy 🏴󠁧󠁢󠁷󠁬󠁳󠁿 (@ChrisEddy_7) reported from Cardiff, Wales

    It’s come to something when you can get 4 bars of 4G signal walking between Benidorm and Albir in Spain but can’t even get 3 bars of 3G signal in Cwmbran South Wales 👀 @o2

  • Daniel_Lyddon 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...

  • sarlpar 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

  • stuomac88 Stuart Maclean (@stuomac88) reported from Abertillery, Wales

    @O2 supposed to have had a bill credit applied to my account due to mast issues. Can you check this for me as still not showing on my o2?

  • davesouthphoto 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.... 🙄

  • BristolOli Bristol Oli (@BristolOli) reported from Cardiff, Wales

    @BS3Rob @O2 @WBA Been horrendous for weeks - Can’t complete a call without having to call back numerous times - BS3 probably the worst of them all but M4 corridor from Cardiff to Bristol is a close second

  • BigDogWrestler 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?

  • Daniel_Lyddon 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...

  • sarlpar 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. 😖

  • CharlBalcombe 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? :-(

  • Daniel_Lyddon 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" 🙄😡

  • Daniel_Lyddon 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

  • Shaunalj93 Shaunalj (@Shaunalj93) reported from Ferndale, Wales

    I need some help @O2. I was told I can get o2 open as I have a @bluelightcard but when I’m trying to register it online it is not accepting my device.

  • divyaparikh_ Divya (@divyaparikh_) reported from Cardiff, Wales

    @O2 Thanks for all the help @O2! Just got a call saying matter has been resolved.

  • mikeyroberts81 Mikey Roberts 🏴󠁧󠁢󠁷󠁬󠁳󠁿 (@mikeyroberts81) reported from Cathays, Wales

    @O2 hi, i am a UK customer, can I use my data in New York as normal? Or will I need to add a bolt on?

  • Lea_May_ Lea French (@Lea_May_) reported from Cardiff, Wales

    @O2 don't recommend upgrading with o2. Terrible service, can't speak to anyone on the phone and waited for over a week for my delivery that was due on Monday!

  • DaiSmashie 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

  • SamHallWales Sam Hall 🏴󠁧󠁢󠁷󠁬󠁳󠁿🐾🐾🌈 (@SamHallWales) reported from Cwmbran Central, Wales

    This Christmas, @O2 is donating data to those who need it. For every tweet using #O2DataPledge this Giving Tuesday, they'll donate even more data to the National Databank. Tap below to tweet your support 👇

  • Daniel_Lyddon 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.

O2 Issues Reports

Latest outage, problems and issue reports in social media:

  • wildfiresmm Karen (@wildfiresmm) reported

    4 weeks waiting for iPhone Pro Max from @O2 . On ordering the lead time was “up to 2 weeks”. My order status was changed to “up to one week” and the “2 to 3 days”. stuck at “2 to 3 days” for 3 weeks - no further updates. Have called with no satisfactory response! Poor service

  • RossSanderson25 Ross Sanderson (@RossSanderson25) reported

    Is there a worse customer service than @O2 , my account was hacked last Tuesday, they’ve blocked everything while they investigate, I’ve had zero communication and everytime I call I basically end up having the same conversation, avoid them at all costs!!

  • Michele39582547 Frex_MG (@Michele39582547) reported

    @O2 anyone else struggling to speak to O2 in recent years? A simple contract renewal SIM only for a fair price seems impossible. You can’t get through on phone lines. Chat takes an eternity and there are scams constantly!! Are they now the worst provider?

  • SasCobbold SassyCob (@SasCobbold) reported

    Dear @O2 please explain why I am not getting coverage on my phone for internet browsing ? I’m in a place with good signal and never had a problem before now it’s very frustrating …

  • Steveshippam Steve ⚔️ (@Steveshippam) reported

    Hey @virginmedia @O2 over 2 weeks I’ve not been able to sign on to my app , called you up twice to try and fix it and even your staff can’t explain why , saying try again in 24hrs , what’s happening 😡

  • YusefJBMalik JROY (@YusefJBMalik) reported

    @O2 barely haven’t been able to use safari all day criminal network worst in the world I know virgin most deffo regret joining these bums

  • QuirklessBaddie Santoryuu T (@QuirklessBaddie) reported

    I need @O2 to tell me why the Internet connection in Easy Croydon station area is nonexistent?? Like I’ve been getting ZERO service there

  • LfcShaunjudge Shaun (@LfcShaunjudge) reported

    @O2 glad my contract is up... Literally the worst mobile company I have used... I work all over the country... 5G is 3G with a 5G mask on in most places... @virginmedia you had a stinker teaming up with this lot.. @EE was better by far...

  • MurphyandToby Toby (@MurphyandToby) reported

    @virginmedia @O2 Sorry we've tried this and the list of options doesn't include the problem. Its really very annoying

  • RoberD65 RobertsD65 (@RoberD65) reported

    @VodafoneUK @O2 @Ofcom Why is Ealing Broadway Station (and pockets in the surrounding area) a mobile data black hole? It has been for years. And nobody seems particularly interested in addressing the problem.