I've got an unlocked HTC One Max which I bought SIM free from Amazon UK. I'm using Three as my network provider in the UK and they've begun rolling out 4G to Glasgow where I live. One of my colleagues is also on Three with a Samsung Galaxy S4 and he started picking up a 4G signal this morning in the office whereas I'm still only seeing 3G. We had a poke around on our respective phones and in the Mobile Network Settings under Network Mode he's got more options than I do, including one for LTE. I've only got two options: WCDMA only and GSM/WCDMA auto. Without being able to select an LTE option in here I don't see how I'm ever going to pick up a 4G signal. Does anyone know why I'm seeing no LTE option in here and how I go about sorting that?