It has been one day for O2 customers. Since 5.30 o'clock no one on O2, Tesco Mobile, GiiffGaff and even some Sky customers could use data, receive 4g or send texts.

BREAKING: O2 and Tesco Mobile network BACK ON – Data is returned after a failure

The company has now released a statement stating that the nationwide default will be resolved.

And now, with so many people coming home from work or picking up the kids from school, this can be good news.

For O2 it should be "tomorrow morning" when everything is ready again.

The network announced (Thursday) the reason for the problems, reports Birmingham Live.

MORE: How O2 and Tesco Mobile customers Get Network Compensation Throughout the Day

And now it looks like the end is finally in sight.

The company tweeted this evening, "One of our third-party vendors has detected a software issue in their system, and our technical teams are working very hard to solve the problem."

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Now, O2 says it's about restoring full data services "tomorrow morning."

The company confirmed that the issues would not be resolved until Friday in a release to Sky News.

People have reported that problems with 4G and data services have occurred, so they have no access to the Internet.

This not only meant that they could not get into social media, but also train users could not download their tickets on their mobile phones.

MORE: When O2, Tesco Mobile and GiffGaff Network fail, Mark Evans, CEO, speaks out

Many commuters buy their train tickets in advance and then download them every morning, but this strategy has left a lot of damage today.

Some commuters were lucky and could use free WI-FI at the station. This was not the case for everyone – some had to buy another ticket!

A general overview of a sign at the O2 headquarters in Slough, Berkshire, the network said it was investigating a technical flaw that prevented thousands of mobile customers from going online

One person has tweeted: "@ O2 How festive is that? I just had to buy a normal train ticket because the network failed! # O2down @thetrainline."

Another said, "Was not helping this morning when I could not activate my train ticket and I was forced to buy another job ticket to work. I am not a happy friend. "

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Others were lucky and had sympathetic employees at the ticket barrier:

West Midlands Railway tweeted this morning: "Due to an O2 network problem, you accept your booking confirmation if you can not download your tickets for validation, and Ticket Barrier staff are aware of this issue."

They added that where WI-FI was available aboard the service, passengers could connect to download and activate their tickets in the event of ticket checks on board.

Virgin Trains tweeted and ordered passengers to download their tickets via WI-FI before traveling, but many people discovered a slight error in communication.

Elsewhere at Bristol Live:

O2 tweeted an update this lunchtime: "Our teams work closely with one of our third-party vendors who have identified a problem in their system that has affected mobile services worldwide.

"That's our top priority and we're really sorry."

Not only is the problem limited to O2 – the failure also means that service providers using the O2 network, such as GiffGaff, Tesco, Sky Mobile, Lyca Mobile and TalkTalk, have the same problem.