Mobile network O2 is experiencing problems which are affecting customers across the UK.
Telefonica owns O2, with 25 million customers, and GiffGaff ("the network run by you"), but is also used by millions more who use Sky Mobile, Tesco Mobile, Lyca and TalkTalk's operation.
Thousands of mobile phone users across Kent have lost their data service this morning.
The mobile network said it had set up an urgent investigation after customers reported being able to get online or use mobile date from the early hours of Thursday.
It was confirmed by O2 earlier today that the it has been identified as a software issue within the system of one of their 3rd party suppliers.
O2 said its technical teams are working with its supplier's teams to fix the problem.
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If you spent this morning freaking out you'd used up your data allowance and tried desperately to call O2 to give them a piece of your mind, you're not alone.
"Voice calls are working OK. we are sorry for any inconvenience".
TFL said: "The company that updates the data to our network of Countdown Systems is now experiencing difficulties in providing this service".
"Our technical teams are working with their teams to ensure this is fixed as quickly as possible".