O2

O2 Outage Report in Castlereagh, Northern Ireland

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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 Castlereagh, Northern Ireland

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

O2 Outage Chart in Castlereagh, Northern Ireland 12/19/2025 08:35

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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 (31%)

    Internet (31%)

  3. Total Blackout (15%)

    Total Blackout (15%)

  4. E-mail (4%)

    E-mail (4%)

  5. Wi-fi (3%)

    Wi-fi (3%)

  6. TV (1%)

    TV (1%)

Live Outage Map Near Castlereagh, Northern Ireland

The most recent O2 outage reports came from the following cities: Belfast and Carrickfergus.

Loading map, please wait...
City Problem Type Report Time
United KingdomBelfast Phone
United KingdomBelfast Phone
United KingdomBelfast Phone
United KingdomBelfast Phone
United KingdomCarrickfergus Phone
United KingdomBelfast 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 Castlereagh, Northern Ireland

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

  • GarethAJMiller Gareth (@GarethAJMiller) reported from Belfast, Northern Ireland

    @O2 how can I get in touch about my last bill? Recently left o2 so not letting me start a live chat as I can’t login

  • DAVIDBUZZ2904 DAVIDBUZZ2904 (@DAVIDBUZZ2904) reported from Lisburn, Northern Ireland

    @O2 @druwakely I’ve never got an @O2 treat they charged an elderly customer my gran over £200 on pay as you go for a month

  • thebaldfather Hugh Pollock (@thebaldfather) reported from Belfast, Northern Ireland

    @O2 I am amazed by the lack of support from your network. Trying for a week now to get help and your help and advice is pathetic when you eventually answer.

  • billyjatkins billy (@billyjatkins) reported from Belfast, Northern Ireland

    @seanp280 @O2 Where are you in Belfast? I live beside city hospital and I get full bars all over the city, 5G too! Only when I venture into the depths of County Down does it deteriorate lol

  • catherine271076 Catherine Dwyer (@catherine271076) reported from Jordanstown, Northern Ireland

    @O2 I need to escalate a complaint re. a member of staff who refuses to to 1) process my upgrade and 2) who has just terminated my call. Who can I talk to? Your staff say it’s not possible to talk to a manager.

  • salexander835 Stuart A (@salexander835) reported from Holywood, Northern Ireland

    @O2 I can't get logged into my account through the app or via the Web. Is there an issue?

  • IanRobinson Ian Robinson (@IanRobinson) reported from Stormont, Northern Ireland

    @chriswb @O2 No. Plus it says No Service where the O2 logo should be. I might try the SIM in my O2 iPhone.

  • DAVIDBUZZ2904 DAVIDBUZZ2904 (@DAVIDBUZZ2904) reported from Lisburn, Northern Ireland

    @O2 Hi I’ve switched my gran switched from pay as you go to pay monthly and her phone number still hasn’t switched can someone help

  • AskkeithInfo askkeith.info (@AskkeithInfo) reported from Castlereagh, Northern Ireland

    @O2 Reece in your forestside store was a legend I ran through door cut off from world and all sorted for phone and lap top in 12 mins a credit to public service he’ll be snapped up by someone soon give him a pay rise and pat on back

  • kkanecelt kierankane (@kkanecelt) reported from Belfast, Northern Ireland

    @o2 is the worst shittiest network I've ever been on in my life

  • gareth_thmpsn Gareth Thompson (@gareth_thmpsn) reported from Belfast, Northern Ireland

    @O2 you guys got a number to your payments team? I need to speak to someone. Automated IVR is poor.

  • UberGeekFanboy Fanboy (@UberGeekFanboy) reported from Belfast, Northern Ireland

    @O2 trying to phone through to return a phone and keep getting cut off? Wtf.

  • McGuinnessKevin Kevin McGuinness (@McGuinnessKevin) reported from Belfast, Northern Ireland

    @o2 any chance you can sort out the masts in Belfast.. really slow connections and dropped connections, I’m even with o2 (was with you when it was BT Cellnet) I’m with sky who use your network but I know of o2 customers having the same issues. #o2network

  • DAVIDBUZZ2904 DAVIDBUZZ2904 (@DAVIDBUZZ2904) reported from Lisburn, Northern Ireland

    @O2 Hi my gran is an elderly customer of 02 and keeps getting calls from 02 and has said many times not to ring her again and you keep doing so I want an explanation !

  • liznangel3 Liz Cullinane (@liznangel3) reported from Balmoral, Northern Ireland

    @EmmandJDeSouza Burnfoot, Donegal house in Derry UK Workshop Donegal, Irl @O2 flicking from roaming to home constantly, useless turning it off roaming I'd never get any work done👿

  • apallan ANN P V ALLAN (@apallan) reported from Belfast, Northern Ireland

    @Girlzmum Very poor service from @O2 especially to a front line worker in the NHS #NHS who needs her phone.

  • StephenScarth Stephen Scarth (@StephenScarth) reported from Bangor, Northern Ireland

    @O2 Hi having problems making and receiving phone calls on a IPhone SE #O2

  • RunRosyRyanRun Bacon From Heaven (@RunRosyRyanRun) reported from Belfast, Northern Ireland

    @O2 I won an instant prize from Greggs but no voucher appeared, can you help?

  • padraigmc1988 padraig mc crory (@padraigmc1988) reported from Belfast, Northern Ireland

    Is it just me or has @O2 phone signal went to the absolute dogs?

  • JeremyAdamsNI Jeremy Adams (@JeremyAdamsNI) reported from Belfast, Northern Ireland

    Kudos to @O2 for customer service today. Recommend going via app ‘Start a Conversation’ section.

O2 Issues Reports

Latest outage, problems and issue reports in social media:

  • HantsHog50 BitToTheLeft (@HantsHog50) reported

    @GarethTurpin Dear Gareth, thank you for PERSONALLY telling me that my @o2 bill is going up by 17.3%. How many customers are you going lose? A LOT. Are you going to let me leave early? I'm saying to you PERSONALLY that I won't be an O2 customer for much longer.

  • harmeetsbrar Harmeet Singh Brar (@harmeetsbrar) reported

    @O2 i love how my bill has gone up but the services has gone down

  • BrianCol2021 Brian (@BrianCol2021) reported

    @O2 @VMO2News @virginmedia My o2 website down all day, been trying to log into my account after email announcing increase of charges April 2023 price of monthly will rise 13.4 (RPI) rate of inflation, plus an additional 3.9%. Its actually more than that my new charge is over 20%

  • paulm844 Paul Marshall (@paulm844) reported

    @AidanGarnish @O2 @Ofcom Tbh I wish I'd stayed with Three; it was only because of the combined Volt benefits of Virgin+O2, and because of the roaming. Obvs I knew RPI+3.9% but given current situation it just feels like being fleeced. Service is also mucho **** compared to Three; O2 coverage terrible!

  • MR_Counselling Matt Ridley (@MR_Counselling) reported

    @O2 Hi, please tell me why I must be put in a queue that is 1 hour long in order to cancel my contract? Only then to be hung up on?… who has a whole hour to wait in a phone queue? Is there another way please?

  • TreatsSb @Lovelife (@TreatsSb) reported

    @o2 Can someone help please. I need to do a transfer of ownership today. But I can't get through on the phone due to 'high demand'

  • Cassandra234 Tosca (@Cassandra234) reported

    @O2 I will be leaving as soon as my contract ends never to return and will urge all friends and family to avoid you like the plague.

  • byeflop JC (@byeflop) reported

    @O2 Im sorry this is ridiculous @Ofcom @TheFCA can you please help me get this code im constantly being ignorned by this network when trying to get it?

  • Sentfromdevon1 Sentfromdevon (@Sentfromdevon1) reported

    @O2 thank your CEO for me please. His lack luster attempted to making it sound like, you raising the prices again of my line rental is a wonderful Idea. Pity the service is shocking for the hike in prices. X

  • Suw Suw (@Suw) reported

    @paulm844 @O2 @Ofcom Mine's gone from £12 to £14 in 10 months. OK, it's only a couple of quid, but everything's going up. They're blaming increased data use, though the data service here is rubbish. Half the time I can only get 3G.