Brits using mobile networks EE, O2, Giffgaff, and BT Mobile are unable to make calls this evening, UK time, amid an ongoing network breakdown. Judging from complaints online, subscribers cannot make outgoing calls, and some can't receive any, either. It appears the fault lies in the BT national network.
"There seems to be what looks like a fairly major technical issue with some UK mobile networks right now," said one source. EE said it is aware its phone network isn't working properly, and said "engineers are working on the issue and will resolve as soon as possible." Giffgaff, meanwhile, is reporting that its customers are unable to make any outgoing calls to landlines, mobiles outside of O2's network, and calls to 0800 numbers are currently down.
http://www.theregister.co.uk/2016/01/11/bt_o2_and_ee_hit_by_network_issues/
Wish BT and o2 had updated their service status pages. Been on the phone to BT for ages after the landline was having problems ringing out (only numbers to test on were o2 and EE unfortunately)
