O2 says texts and data problems have now been fixed after more than 24 hour outage

O2 CUSTOMERS were furious after being unable to send texts this morning following a major data outage - but O2 says the problem has now been resolved.

In a statement made at 3.30am, O2 said its 4G network was back up and running after its 3G network came online last night.

It follows a 24 hour service outage that left millions of O2 customers across the UK fuming.

"We can now report that our 4G network has been restored," a spokesperson said.

"Our technical teams will continue to monitor service performance closely over the next few days to ensure we remain stable.

"A review will be carried out with Ericsson to understand fully what happened.

"We'd like to thank our customers for their patience during the loss of service on Thursday December 6 and we're sorry for any impact the issue may have caused."

But this morning, the provider admitted that a "small proportion" of customers were reporting problems sending text messages.

As of this afternoon, it says this issue is resolved and the complaints on social media seem to have dried out.

One O2 customer wrote on Twitter this morning: "Still getting a failed message every time I try and send a text."

Another Twitter user called Mark, a customer of GiffGiff which piggyback's on O2's network, said: "Still having issues with the network, I'm on GiffGaff network which uses O2 and I'm having probs sending text messages.
 "My phone just keeps failed to send every time I send an SMS. Calls have interference, data is ok."

Another GiffGaff user called Anne wrote: "After the situation yesterday when the data went down, I cannot send texts normally.

"It says 'not delivered' on my phone - but to the recipient, it spams them with the same text I sent. I have an iPhone 6s and I have the £20 plan. Please help - thank you!"

Both O2 and Sky Mobile have announced redress packages for customers but GiffGaff, Lycamobile and Tesco Mobile are yet to announce their plans.

As well as customers with O2, Tesco Mobile, GiffGaff, Sky Mobile and Lycamobile, the outage has also affected systems relying on the same network such as the electronic timetables for London's buses and Boris Bikes due to their O2 sim connections.

The system fault brought particular stress and difficulty for Jennie O'Grady yesterday as she used O2 data to monitor her type-1 diabetic daughter's blood sugar levels.

She told the Daily Mail: "We rely massively on her having internet access. She can be sleeping in her bedroom and it is sending me her blood sugar levels.

"I would get an alarm to say she is having a hypoglycaemic attack if her blood sugar levels dropped below four, which would mean she need treatment immediately and could go into a coma.

"Without it I have been completely clueless and I have not been able to check on her."

How can you claim money back after the 24 hour O2 network outage

GiffGaff, Tesco Mobile, Sky Mobile, Lycamobile all "piggyback" on O2's network, meaning the O2 outage has affected their customers too.

Piggybacking is really common among mobile networks in the UK.

In fact, there are only four UK mobile networks - EE, Three, O2 and Vodafone - and all the other providers piggyback - ie, buy space from - one of these networks.

Tesco, GiffGaff, Sky Mobile and Lycamobile are on O2, Asda is on EE and TalkMobile is on Vodafone.

When it comes to whether customers will be offered compensation, O2 says it will give customers TWO days free as compensation for 4G data problems - here's what you need to know.

Sky Mobile has already confirmed that customers will get free unlimited data tomorrow.