The mobile phone operator, with more than 25 million customers, has agreed to compensate users for the disruption after pressure from disgruntled customers who were unable to use the internet or in some cases make calls.
The firm said it would be giving its pay monthly, small and medium business and mobile broadband customers credit for two days of monthly airtime subscription charges.
KitGuru Says: This is a particularly sore spot for those that suffered loss of earnings during the downtime, but I can't say it's been pleasant for anyone as an O2 customer myself.
On Thursday, O2 issued a joint apology with telecoms company Ericsson over the incident.
O2 said it would update customers later on Friday on how "we will make yesterday's data service issue up to them".
"The bigger issue here is that mobile carriers all over the world, including in Great Britain and in Japan, are all running some of the software in question, with control over the maintenance of this proprietary software completely in the hands of a single vendor, in this case, Ericsson".
Serena, Nadal and Murray all confirmed for Australian Open
Nearly all of the world's top 100 men and women's players are also due at Melbourne Park, including Rafael Nadal and Andy Murray. Serena Williams has been confirmed to take part in the 2019 Australian Open as stated on the event's official Twitter account.
Ofcom has approved two ADR schemes for mobile phone service fault and problems - CISAS and Ombudsman Services: Communications.
He said: "I want to let our customers know how sorry I am for the impact our network data issue has had on them, and reassure them that our teams, together with Ericsson, are doing everything we can".
The network said: "We're really sorry for the issues you experienced on Sky Mobile yesterday".
Sky is offering up a day of free unlimited data on Saturday as a way of saying sorry to customers.
Ericsson, which builds most of the backend tech for the majority of cellular network providers, said the downtime was caused by an expired certificated in a version of its management software that some EU-based telecommunications companies use.
Ericsson's President and Chief Executive Borje Ekholm said: "The faulty software that has caused these issues is being decommissioned and we apologize not only to our customers but also to their customers. Connectivity is now such an integral part of our lives, it is time for the regulator to consider whether it should introduce automatic compensation for the inconvenience caused by severe outages", he added.
NY prosecutors called for a "substantial" prison sentence for six offences, unconnected to the Russian Federation ... Cohen also told prosecutors that he and Trump discussed a potential meeting with Putin on the sidelines of the U.N.
The ballooning trade deficit with China is a particularly sore point for Trump, who campaigned on turning around the situation. China's November trade surplus with the United States was a record US$35.55 billion.
Carey, ranked No. 2 in the class of 2019 per 247 Sports , announced his decision in a televised news conference on ESPN. The Blue Devils won the services of Carey Jr. over Michigan State and in state rival North Carolina .
The Yemeni government also plans on requesting that the rebel Houthis relinquish their control over the port of city of Hodeida. Saudi-led airstrikes against the rebels are compounding the misery - wiping out entire neighborhoods and destroying hospitals.
This time, speculation has already been rampant that few in Hollywood want the gig, for which few win glowing reviews. Murphy soon after exited, as well. "He checks all the boxes for a show like the Oscars", Belloni said.
There were no goals during regulation time as both teams matched each other strength for strength all through 120 minutes. There will be three African nations at the tournament, namely Banyana, Cameroon and AWCON champions Nigeria.
Espanyol went looking for a lifeline at the start of the second half, but Barcelona remained risky on the break. In a rare moment of action in the Barcelona penalty area, Victor Sanchez's header dropped wide of the far post.
The French government's tax revenues were equivalent to 46.2% of its economic output, up from 45.5% in 2016 and 43.4% in 2000. The United States tax level equaled 27.1 percent of GDP in 2017, well below the 36-nation OECD average.
In the Netherlands, about 100 protesters gathered in a peaceful demonstration outside the Dutch parliament in The Hague. Last weekend rioters set cars aflame, looted shops and defaced the Arc de Triomphe monument with graffiti.
It was reported that Bill Clinton, her husband and former US President, is expected to join his wife for the celebrations. The Ambanis and the Piramals are hosting the pre-wedding festivities of Isha and Anand in Udaipur over the weekend.
Army beats Navy 17-10
Joining President Trump and Sec. of Defense Mattis at the game were Chairman of the Joint Chiefs of Staff Gen. But the drive flipped the field enough as Navy forced a punt from Army and then scored following the punt.
Skoda Scala Hatchback Unveiled: Walkaround
This serves to automatically close windows and reinforces tension on the front seat belts well before a collision can take place. Skoda plans for turbocharged petrol engines to dominate the Scala line-up when it adds the new hatchback to its range in 2019.
AQUAMAN Sequel In Talks
From the look of things, Aquaman is going to be a massive hit before it even reaches the United States audiences. In the United States , the film is now tracking for a $65 million-plus opening.
Winnike: Flu Season is Here; Prevent what is Preventable
The flu shot is safe for pregnant and breastfeeding women, who can pass on antibodies to their babies that will help protect them. Fact: The flu vaccine reduces the risk of contracting and spreading the disease by up to 60 percent, according to the CDC.
Fund bids $4.6 billion for Sears
That sum could go dramatically up or down, depending on how the bankruptcy process evolves, the publication noted. The offer includes $950 million in cash through an asset-based loan facility and a "credit bid" of $1.8 billion.
Ride-sharing startup Lyft files confidentially for US IPO
The firms compete across the USA as ride-hailing platforms, connecting taxi drivers to passengers through their mobile apps. Lyft has pursued a series of partnerships in the contest to be the first to bring autonomous taxis to the mass market.
How to Watch Bournemouth vs. Liverpool
The England worldwide will also miss next week's Champions League game against Napoli and the FA Cup third round game at Wolves. After a relatively slow start to the campaign, Salah is now scoring at a similar rate to last season.
Real Madrid agree deal with Chelsea for Eden Hazard
The news cycle surrounding Chelsea never stops and as such, it can be hard to keep up to date with everything that's going on. The recent dip has correlated with Chelsea's stutter, which has seen them claim only four of the last 12 points on offer.