I swear whilst on the train home last night my OPO flashed up with LTE signal on the top-right. I know Giffgaff have upgraded everyone to 4G goodybags, but as far as I knew O2's 4G spectrum is not supported on the OPO. Does anyone know any different? My girlfriend (also on Giffgaff) was gloating away that her S5 mini now gets 4G 


