O2

O2 Outage Report in Mountain Ash, Rhondda Cynon Taf, Wales

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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 Mountain Ash, Wales

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

O2 Outage Chart in Mountain Ash, Rhondda Cynon Taf, Wales 02/08/2026 21:35

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Most Reported Problems

The following are the most recent problems reported by O2 users through our website.

  1. Phone (53%)

    Phone (53%)

  2. Internet (29%)

    Internet (29%)

  3. Total Blackout (12%)

    Total Blackout (12%)

  4. E-mail (3%)

    E-mail (3%)

  5. Wi-fi (3%)

    Wi-fi (3%)

  6. TV (%)

    TV (%)

Live Outage Map Near Mountain Ash, Rhondda Cynon Taf, Wales

The most recent O2 outage reports came from the following cities: Cardiff.

Loading map, please wait...
City Problem Type Report Time
United KingdomCardiff Phone
United KingdomCardiff Phone
United KingdomPorth Phone
United KingdomAbertillery Phone
United KingdomCardiff Phone
United KingdomBlackwood Total Blackout

Community Discussion

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O2 Issues Reports Near Mountain Ash, Wales

Latest outage, problems and issue reports in Mountain Ash and nearby locations:

  • DennerSusan susan denner (@DennerSusan) reported from Cardiff, Wales

    @O2 Customer service shocking! No service on phone since 24th May, SIX calls made to your call centre to resolve issue - now being told to wait for

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

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

  • 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

    (1/3) Sad to say that @O2 are now trying to charge me for a service never used, when I cancelled a mis-sold contract within the 14-day cooling-off period. Almost two months later they're now saying they're going to charge me a late payment fee, plus the bill...

  • gareth_thmpsn Gareth Thompson (@gareth_thmpsn) reported from Cardiff, Wales

    @O2 There’s delay then there’s rude. Been 92 working days or 128 days since I complained. @o2 are making it deliberately difficult to contact.

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

    @O2 hi is there an issue with your network in cf14? Havent been able to get 3g or 4g since yesterday?

  • ImogensMind 👑Immy👑 (@ImogensMind) reported from Blackwood, Wales

    @O2 my friends phone network has completely gone down all day, they can’t call anyone including yourselves. Please suggest what they should do?

  • BCFCOLIVERDOG Oliver City Dog (@BCFCOLIVERDOG) reported from Cardiff, Wales

    @JoeSims10 @O2 Look forward to no signal on the Portway Joe 🙃

  • nopantsuk Nick Thorogood (@nopantsuk) reported from Llanharan, Wales

    @O2 my number should be ported to you today that I requested yesterday morning. I’ve had no confirmation texts or emails though and number still on old network. Any ideas?

  • Daniel_Lyddon Daniel Lyddon (@Daniel_Lyddon) reported from Cardiff, Wales

    This weather properly has me over a barrel. Mistreatment by @O2 properly has me feeling down. My #CovidVaccine pain is bad. Some days the demons are just too much to battle...but today is not one of those days. Rest, relax, refocus. #MentalHealthMatters #BipolarDisorder

  • gareth_thmpsn Gareth Thompson (@gareth_thmpsn) reported from Cardiff, Wales

    What is the point of complaining to @o2? Complaint sent 06/09 multiple times chased up formally 20/11 no reply now 06/0/21. Told someone looking at as a priority still nothing @MarkEvansO2

  • clareoj Clare Osborne Jones (@clareoj) reported from Cardiff, Wales

    @O2 still waiting for a refund on a returned phone case since July...numerous phone calls resulting in last one on 11/10 we will take it off your phone bill for you but full amount taken today. Can’t get through on phones can you please advise as I’m pretty fed up with service

  • TweetterRoss Ross Maisey (@TweetterRoss) reported from Church Village, Wales

    @O2 Struggling with no or little service at home at the moment and it’s becoming very frustrating. I checked the service checker and they comes back as ok. My phone says 1 bar but that doesn’t allow me to use the internet.

  • MartynWilliams6 master.vapour (@MartynWilliams6) reported from Maesteg, Wales

    @tescomobile I do enjoy your network, even being part of the @O2 family

  • gareth_thmpsn Gareth Thompson (@gareth_thmpsn) reported from Cardiff, Wales

    @O2 guys is there a backlog in complaints? I responded to a complaint on the 06/10/20 no reply, 20/11/20 no reply. I’ve now sent a further email today and I’ve no faith in it being responded to. Original complaint was 04/09/20.

  • paigebuckingham Paige🧚🏻‍♀️🌸 (@paigebuckingham) reported from Cardiff, Wales

    Anyone else on @O2 and get literally no signal? I’ve had my baby’s doctor and hospital ring me many occasions and can’t get through to me!

  • fgethearies FGE ⚡️ (@fgethearies) reported from Cardiff, Wales

    Anyone else on @O2 ? My signal keeps cutting in and out 😩

  • gwelfor57 Mark Elliott🏴󠁧󠁢󠁷󠁬󠁳󠁿🇪🇺 (@gwelfor57) reported from Cardiff, Wales

    @O2 am assisting my disabled brother. catch 22. No passport or driving licence unable to prove his identity. obtained a PAC. told est. £406.49 of termination charges! He wanted to reduce his monthly cost but O2 shop said no. Been customer for years. Help please.

  • flowersshanice S H A N I C E (@flowersshanice) reported from Cardiff, Wales

    @O2 @Gropinvillain In all these years I’ve been with @O2 I’ve never ever had nothing for bro g a loyal customer, maybe it’s time I cha he networks after my contract is finished!!

  • 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

O2 Issues Reports

Latest outage, problems and issue reports in social media:

  • Jimbobthon James Richards (@Jimbobthon) reported

    @alanwalters6 @O2 @jammergilmore Was in Bristol myself this weekend, the mast in the area is down. Apparently it'll be sorted by September 9th. I'm in Newport today, similar issues. But then, what's new as I always get signal issues in the city centre and nearby parks.

  • Preedyyy KATIEEE ☀️ (@Preedyyy) reported

    @O2 super annoying that I’ve had to contact you twice for the same thing after being left on hold for 25 mins. Now I have no service/phone! I can’t ring the number to get help! My contract doesn’t end till the 3rd Sep and all I wanted to do was get on a o2 pay as you go sim!

  • frinniecp Cat (@frinniecp) reported

    @O2 is there a service outage this morning? South East London area

  • Vicbel76 Victoria Carson (@Vicbel76) reported

    @O2 network down since Sunday and can’t get through to anyone. Can you help please.

  • rcat35 Rose Chilcott (@rcat35) reported

    @O2 Hi, I've tried the network checker and there is a problem it says, however places I visit I still have the same problem. I've checked the status of those and it says the networks is busy to find WiFi- really?

  • Phil_DJ_Smith Phil DJ Smith (@Phil_DJ_Smith) reported

    @O2 hi just wondering if there's any issues in the wakefield area? I'm showing 4g+ but I have a weak signal and my phone just seems to constantly buffer when trying to watch a video or load images. Thanks

  • GarryLynch15 Garry Lynch (Owner of LTOA Taxis) (@GarryLynch15) reported

    This must be really embarrassing @O2 a customer of over 15 years complain about the integrity of the people who are responsible for running the business. Having this aired on a public platform can't be good for business or your business partners within the industry @Telefonica

  • jammergilmore James Gilmore (@jammergilmore) reported

    @O2 Thanks but I’ve had a mobile for 30 years so know how it works and all the tricks .. I’m turning my phone off and on again daily, and turning data off and on again … full signal bars and 4g and it still barely loads anything … it says 3g more than 4g these days

  • StormKaiTasha A Cameron S Conacher (@StormKaiTasha) reported

    @O2 Hi how can I cancel my Disney plus I had free for 6 months. I Can see it on my account.

  • U10631084 U (@U10631084) reported

    @O2 Hello, you told me to expect a reply within 24 hours. It's almost a week later and I have nothing - please help.