Outage Update: Our teams are working closely with one of our 3rd party suppliers who has identified an issue in their system which has impacted mobile services globally. This is our top priority and we are really sorry. Get updates here: status.o2.co.uk

@O2 Just wanted to wish you guys the best whilst your looking into this issue. Christmas around the corner... And had great service with you. Keep up the great work and many thanks. #justwantedtosaysomethingpositive

@O2 Whilst everyone else can't function without data and service... I wanted to say thank you for some peace and quiet! I know it will be resolved soon as you guys are great so in the meantime I shall entertain myself with something else like a book or a CD! Stay positive O2! 👍🏻

@O2 How ya doing O2? The problems means that I get to ignore people’s texts with a reason, so thank you 💜

@O2 Would you like a hug?

@O2 Hope we get compensation for this? I'm paying for a airtime bill that I can't use ATM

@O2 Refund pls! We need our services!

@O2 I assume that no Compensation will be issued for poor service and inconvenience I suggest that at least everyone should be reimbursed for today and I have noticed in picadilly area for a while poor or no coverage during the day is this just part of the o2 excellent service

@O2 Is there a time frame, or is it the usual 17 days it takes @O2 to deal with most outages?

@O2 I am disappointed there was no redundancy in the O2 mobile network. I expect O2 to give its private mobile broadband customers in UK a rebate of at least 1/30 monthly subscription fees. Business customers may have other claims based on their service contracts.

@O2 Shit happens. Well done for getting it back on!

@O2 Can we all have a silence for all the front line staff in the stores, who'll be dealing with Sandra and her pushchair today 🙏 #o2down #o2

@O2 Had to come to Costa to use WiFi. I’ve had 5 large coffees, cost me £97, the caffeine in turn has made me spend £500 internet shopping, booked 7 holidays and I now sponsor a donkey in Dorset (clicked by mistake). Hope you’re proud of yourselves & you’ll be refunding me it all 🐴

@O2 My @O2 contract is up for renewal and due to this ridiculous situation I’m seriously considering switching to @virginmedia or @VodafoneUK or @EE - do you three have any good iPhone deals at the moment?

@O2 Sort it aaaaaaaaaaht

@O2 How you holding up?

@O2 @O2 engineers this morning

@O2 Cheers, sons crying.

@O2 My work contract is with you guys! How on earth am I meant to get in touch with my clients? Just kidding! The down time means I can crack on with my Christmas shopping, you guys take your time.