O2

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

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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 02/26/2026 04:40

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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

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O2 Issues Reports Near Treharris, Wales

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

  • 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. 😖

  • 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.

  • 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...

  • 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

  • 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.

  • 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" 🙄😡

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

    @BS3Rob @O2 Glad it wasn’t just me - No signal anywhere near the ground

  • 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?

  • 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!

  • 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 👇

  • 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

  • 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...

  • 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

  • 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

    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

  • 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.... 🙄

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

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

  • 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?

  • 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? :-(

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

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

O2 Issues Reports

Latest outage, problems and issue reports in social media:

  • markjoy62 Mark Joy (@markjoy62) reported

    Utterly frustrating dealing with @O2 - got my bill today and a message saying my data has been leaked and I need to change password - try to do so but caught in misinformation loop - phone and get an IVR that can’t hear me Big companies offer no personal service at all

  • Laura_B_R Laura (@Laura_B_R) reported

    @O2 Trying to pay my bill online. It won’t save my card so can’t do it. Also work let me pay on the phone. Help!

  • Stuckinlondon1 Stuckinlondon (@Stuckinlondon1) reported

    @O2 I’ve been trying to get to on the phone for over an hour. The signal is terrible and the robot makes everything so hard!! I just need my phone to work

  • AnthonyChurm Antonio75 (@AnthonyChurm) reported

    @O2 hi.. i cannot seem to get any online help with my query.. i have around £30 credit on a paygo sim.. can i buy a bundle from the credit to last a month?

  • aquaman4002 Arthur Curry (@aquaman4002) reported

    @O2 @ammyylp Why is Pay Monthly worse than PAYG? For Xperia L4 Pay Monthly 12 month contract is £28 per month = £336 £13 device * 12 = £156 £15 tariff * 12 = £180 5GB PAYG for 12 months is £240 (£96 cheaper) £120 device £10 PAYG * 12 months = £120 6GB No incentive to be loyal customer?

  • ClaudineStanbu1 Claudine Stanbury (@ClaudineStanbu1) reported

    @O2 just received a call from you on my house and mobile phone. Answered both times but was disconnected both times. Do you need to speak to me if so why hang up🤔

  • kassborra Kev (@kassborra) reported

    Hey guys @O2 Had really slow data for over 24 hours now in NN1 4RR. Checker states there is a problem with a nearby mast. Any ideas on a timescale for repairs. 🙏 Thanks, Kev

  • theOGSeffect Up The John 🔴⚪⚫ (@theOGSeffect) reported

    @russell_vine @O2 If been a bad month russell everything is f-ing me over I am a very stressed out person right now just told o2 that I want an investigation doing as I wasn't listened to and now I've got no money what so ever till next Thursday let's hope my electric lasts or am fked

  • RebeccaZoe becca (@RebeccaZoe) reported

    @O2 hii, I joined you guys and gave pac code last Thursday eve. Number still not switched. You started helping me in DM but have stopped replying and are ignoring my tweets. Please answer me! Such bad customer service to a new customer ?!?!

  • zshanahmd ZEE (@zshanahmd) reported

    @O2 hope my query has reached to its solution did not receive any update so far.