MILLIONS of Brits have been warned to check their mobile device as they could lose access to data very soon.
The change is coming to O2, but it will affect other operators that use the network too, including Tesco Mobile, GiffGaff and Sky Mobile.
AlamyO2 is the last big network to close 3G[/caption] AlamyOlder phones like the iPhone 4S are among the models affected[/caption]O2 is starting to switch off its 3G network this year in favour of faster 4G and 5G services.
Rivals Three...