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 12/30/2025 09:25

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Most Reported Problems

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

  1. Phone (46%)

    Phone (46%)

  2. Internet (32%)

    Internet (32%)

  3. Total Blackout (14%)

    Total Blackout (14%)

  4. E-mail (4%)

    E-mail (4%)

  5. Wi-fi (3%)

    Wi-fi (3%)

  6. TV (1%)

    TV (1%)

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

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

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

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

  • staceyjhubbard Stacey J Hubbard 🐧 (@staceyjhubbard) reported from Cardiff, Wales

    There is always some kind of problem with my @O2 order. Its even more frustrating seeing on here people have just walked into the store and been able to collect the phone without the relevant email saying its ready to collect. How do they know they are distributing the right

  • jamieriddell Jamie Riddell (@jamieriddell) reported from Cardiff, Wales

    Hey @O2 who can I talk to about unlocking a phone. I've paid up and out of contact. Online form says no because of too many attempts ( no idea what my customer service code was) but I have all my account details.

  • daunce4thstreet Garry Dauncey (@daunce4thstreet) reported from Pontypridd, Wales

    Never use @O2 recycle! sent them a phone that was in perfect condition & now they say the phone is damaged and are offering peanuts for it. If it’s damaged blame the flimsy packaging you send.

  • CJLittlemore Callum James Littlemore 🔶 (@CJLittlemore) reported from Cardiff, Wales

    @O2 I woke up this morning to find I’ve been totally cut off. I can’t make calls, send texts or use my mobile data. All of this is kinda important for my work as I’m self employed - I can’t call your customer service line to see what the issue is. Can you look into it please.

  • Rhian1975 Rhian Langham (@Rhian1975) reported from Cardiff, Wales

    @O2 shocking attitude of customer service rep. Please get in touch.

  • Bubwal Ade (@Bubwal) reported from Cardiff, Wales

    @RobBruceK @ThreeUK @O2 @EE @VodafoneUK No awful. Just spent 5 days with no data/calls due ti Insufficient bandwidth. My family and friends who were with O2/BT/Vodaphone had no problems. Worst ever. So regret leaving previous provider last month. Their coverage checker is inaccurate too

  • andrewhillandCo andrew hill (@andrewhillandCo) reported from Abercynon, Wales

    @O2 @JohnnyMercerUK bit late that isn’t it - I think he has just a few followers who may have seen this and your ‘standard good customer response’

  • BradChanner Brad Channer (@BradChanner) reported from Cardiff, Wales

    @teamIPSE Without a doubt! And phone signal! It is appalling how bad the signal is in parts of the UK outside of London! I am 4 minutes from the Cardiff city centre with no signal! #howareyoumeanttorunabusiness @o2networks @O2 @giffgaff

  • ThisIsDanGuy Dan Guy (@ThisIsDanGuy) reported from Cardiff, Wales

    @O2 sucks that reduced the number of cafe Nero codes 😡

  • staceyjhubbard Stacey J Hubbard 🐧 (@staceyjhubbard) reported from Cardiff, Wales

    Also when I highlighted my issues over the phone and through the Webchat @O2 do not seem very concerned or understanding 😔

  • pwilliamsevents Paul Williams Events (@pwilliamsevents) reported from Tongwynlais, Wales

    Totally disappointed with @O2 customer service. A number transfer from a consumer account to business took 8 days when I was told it would take 24 hours. 3 phone calls to customer service and still not 100% sorted. #totallycrapexperience

  • pwilliamsevents Paul Williams Events (@pwilliamsevents) reported from Tongwynlais, Wales

    @jolilford @O2 Your kidding me!!! I have contacted customer services 3 or 4 times. Shocking service

  • BradChanner Brad Channer (@BradChanner) reported from Cardiff, Wales

    @O2 This has always been an issue. We are with giffgaff whom I believe use your signal. I have tried everything. I have even bought a booster, but the reception coming into the booster isn’t enough to even make the booster work. Very frustrating. I have to sit in a window 4 reception

  • kdhanz KD Hansford (@kdhanz) reported from Mountain Ash, Wales

    @EE I'm fed up of your network in aberdare. It hasn't worked tidy for months and I have two contracts with you. Please sort it out or I'm leaving to @VodafoneUK or @O2

  • ieuanbeal15 Ieuan-Rhys Beal (@ieuanbeal15) reported from Cardiff, Wales

    @O2 your live chat service is garbage. 15

  • bethanjane22 Beth (@bethanjane22) reported from Cardiff, Wales

    When I renew, @virginmedia offer free AirPods with some plans and @O2 do the same! So much for customer loyalty, they just want more and more money! 🤬

  • gingio Shane (@gingio) reported from Cardiff, Wales

    @jgfoxy @O2 @ThreeUK Good choice! I love being with 3 and find my signal is much better than that on my work phone which is o2.

  • Welsh_PA Mark Edwards (@Welsh_PA) reported from Cardiff, Wales

    @PA_Stacey Oh yes @O2 love to go OTT on bill notification. It’s a shame they don’t put more emphasis on sorting out their weak/phantom 4G signal 📡 #priorities

  • HywelButcher Hywel Butcher (@HywelButcher) reported from Cardiff, Wales

    Top tip - don’t join @O2 - incompetent and useless! First no 4G, now no signal or data at all 🤯

  • LisardoVivas Lisardo Vivas (@LisardoVivas) reported from Cardiff, Wales

    @O2 @tig1985 I’m in cardiff with same issue

O2 Issues Reports

Latest outage, problems and issue reports in social media:

  • fraya_bethany Fraya Bethany (@fraya_bethany) reported

    @O2 Hello! Is the Odeon ticket deal not working or did they sell out super fast today? I’ve never known it actually run out!

  • HandmadebyJoAnn Make n Mend - by Jo-Ann Middleton (@HandmadebyJoAnn) reported

    @O2 Customer Services. No phone signal in the village can cope! Now no wifi calling ??? Help MI note android?? 02 not helpful

  • emzlewie Emma Lewington (@emzlewie) reported

    @O2 been a customer for 15 years absolutely appalling customer service today being pushed for pillar to post hung up on 3rimes wrong advice from your agents and taking money I have not authorised you to take. Absolutely ridiculous

  • andythorngate Andy Thorngate (@andythorngate) reported

    @O2 how hard do you need to make it for a new customer to get support ??

  • MeganAliceRose Megan Alice Rose (@MeganAliceRose) reported

    @O2 Hi I’m out in America and my dads data roaming is not working despite being turned on etc. can you assist please

  • TheNeensSpeech Nina Salome✨ (@TheNeensSpeech) reported

    @O2 why have I had no service or 4G all day? Was fine yesterday.

  • BR_4_NN linda carter supremacy (@BR_4_NN) reported

    @O2 why is mine and my sisters signal so diabolically ****, i had no service when i was at home now i've come out it went to 3G then to E until i restarted my phone?

  • neilwallace403 Neilwallace403@gmail.com (@neilwallace403) reported

    @ezzeeegooner @O2 @SkyUK I live in the middle of nowhere and Vodafone Wi-Fi calling is excellent at home. I don’t have too many problems with the signal as a lorry driver I’m all over the country and very rarely suffer signal problems

  • Helen_Smart1 Helen Smart (@Helen_Smart1) reported

    @O2 Thanks but this doesn’t help the fact that a colleague of yours didn’t tell me the truth yesterday….

  • Wanessa_gr Wanessa Brito (@Wanessa_gr) reported

    @O2 it would’ve been nice to have been warned about work on your network around Bracknell area. No signal this week and apparently it may last till 19th June? 😱😱