Major network provider warns customers they will be left with NO mobile data unless they upgrade as service closes

A MAJOR UK mobile network is warning customers they will be left with no mobile data soon unless they upgrade their phone.

Fortunately, there is a £100 voucher on offer to soften the blow.

AlamyO2 is the last network to switch off 3G[/caption] PA:Press AssociationOther providers like GiffGaff are also affected[/caption]

O2 has already started switching off its legacy 3G network as part of a national effort by all the UK’s providers.

The firm’s plan also affects...