Customers have reported problems with the O2 and Vodafone networks on Tuesday with a wide outage across the UK.
Over 5,000 O2 customer have complained as their signals dropped, but according to Downdetector the reasons for the UK wide outage is unclear.
O2 said in a statement, “We’re aware of an issue impacting some voice calls. Our technical teams are investigating.
“We apologise for any inconvenience. Updates will be shared here as soon they are available.”