O2

O2 Outage Report in Castlereagh, Northern Ireland

No problems detected

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

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 08/17/2025 02:55

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 (52%)

    Phone (52%)

  2. Internet (25%)

    Internet (25%)

  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: Lisburn, Belfast and Bangor.

Loading map, please wait...
City Problem Type Report Time
United KingdomLisburn Phone
United KingdomBelfast Phone
United KingdomBelfast Internet
United KingdomBelfast Phone
United KingdomBelfast Phone
United KingdomBangor 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:

  • 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

  • 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.

  • BrendanB2 Brendan Bonner (@BrendanB2) reported from Belfast, Northern Ireland

    @O2 I wouldn’t recommend anyone buying online and redeeming your phone. Go to the store, you can’t trust any of the online and virtual services. Was a handling getting phone set up, getting help and they only give you 50% of the value they say (no matter how good your phone is).

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

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

  • 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

  • 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?

  • 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.

  • 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.

  • 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 !

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

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

  • 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

  • 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

  • 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.

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

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

  • 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👿

  • 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

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

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

  • SWAshleigh Ashleigh Shaw (@SWAshleigh) reported from Ballygowan, Northern Ireland

    How do I make a complaint with @O2

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

    @O2 AirPods and 🎅 is looking after them! Again fantastic service.

  • 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.

O2 Issues Reports

Latest outage, problems and issue reports in social media:

  • thekinaton 🔥🕊️ Jason Sensation 🔥🕊️ (@thekinaton) reported from Brighton and Hove, England

    My sister just told me her voucher from @o2 didn't work. Im not paying the massive increase prices for a one day Ticket. Anyone able to help her out 🙄 #EGX2022

  • JdfockerAgnew Blue Wingnut (@JdfockerAgnew) reported

    Oh the irony, @virginmedia still down & will b repaired by 10am tomorrow 🤥 So I figured I could use my @O2 data, however it seems every ****** is having 2 do that so the signal is ****

  • jordenledger Jorden (@jordenledger) reported

    @O2 you really need to get stuff sorted sooner than expected , I’ve got told yesterday I will receive a phone call today, which I didn’t know and now I’ve been told I need to wait 3 to 5 working days to get my signal back on which is ridiculous , and I’ve been with you 4 years

  • k_ross69 Keith Ross 3x💉,💪🇺🇦🌻 (@k_ross69) reported

    @O2 one of yours I believe. Might want to consider disconnecting them for using your network for fraud.

  • thefirkinbar The Firkin (@thefirkinbar) reported from Newton-le-Willows, England

    @WilJudkins @EE Im on @O2 the date coverage is absolute terrible. Minus a random field in Donnington.

  • SimpaticoGem Gemma ≅ (@SimpaticoGem) reported from Walkden, England

    Tell me why with my @virginmedia wifi and my @O2 phone contract, MY WIFI CUTS OUT CONSTANTLY AND I HAVE NO SIGNAL ANYWHERE I GO?! Thought being a customer of you both was supposed to reap massive benefits for me?

  • foxcanburn philip garnier (@foxcanburn) reported

    @O2 dont trust o2 they offer you stuff then dont follow through and deny what they have said despite having paperwork to prove it Go with Giffgaff they use the same network anyway and they actually care about their customers. o2 are a joke

  • LittyMan Paul Lewis (@LittyMan) reported

    @o2 you seriously need to up your game. No decent 4g in the middle of Bath. Really? Wanted to tweet about my favorite rugby team at the ground. But no chance. Please don't reply with a 'sorry' it is just lip service. Do something about it instead....

  • jowhite1 Jo White (@jowhite1) reported

    @O2 Hi, mine and my daughter's signal has suddenly, over the past day, lost service. We can't get any signal in our house, which we've had no problem with previously, meaning our phones are constantly emergency service only. Are you able to look into it?

  • ladysmanca Simona_la tradulettrice (@ladysmanca) reported from Edinburgh, Scotland

    @O2 Thanks! As I need my phone for work I need to sort the issue soon.