The O2 telephone network crashed today, which could leave hundreds of thousands of people in the United Kingdom without a signal.
The Down Detector fault tracking website recorded an increase in reported network problems, peaking at 2.30 p.m. from today.
Most of the problems were recorded in Liverpool, Manchester and Newcastle upon Tyne.
At 4 p.m. the problems had been resolved, O2 announced.
Before they went many people turned to social networks to report problems with their phones.
“I haven’t been able to contact anyone all day because my phone doesn’t let me make phone calls or send messages,” a woman wrote on Twitter.
“Keep saying unreachable!”
Another person added: “Hi. I just got a pop-up window that says O2 has eliminated 4G calls. Is this a technical problem?”
Shortly after 3 p.m. Today, O2 responded to a customer complaint explaining that a mast did not work.
A spokesman for the network said the network as a whole was not inactive, but a small number of WiFi and 4G data calls were affected.
They added: “We are aware that a small proportion of customers who use voice calls through 4G or Wifi data may have experienced problems in the last hour.
“Customers who do not use these services are not affected and O2 data is not affected. Customers can continue using 3G and 2G to make calls in a normal manner.
“Our teams are investigating and we apologize for any inconvenience. Updates will be shared as soon as they are available.”
In December 2018, O2 said its 25 million customers in the United Kingdom will get up to two days of credit in compensation as a gesture of goodwill after a cut in the United Kingdom.
Large parts of the population could not connect online for almost a day.