Hi all
I've had a look around the forum and all posts on this subject relate to US versions of this problem.
Anyway, I don't live in a 4G area, but yesterday I happened to be in central London. But I had no 4G. I went into the settings and there was no 4G option, only GSM and WCDMA. I downloaded an app and forced it into 4G and it worked, although I only ever got 1 bar, but the data worked.
I called Three, they said I should send it back to HTC for repair! I said thanks but no thanks.
I bought my phone SIM free in the UK from Expansys, I checked the bootloader screen, it's a W7_UL (I believe the L means it's LTE enabled) and I've rooted it (no custom ROMS, just root). I suspect I don't have a 4G SIM, but I don't know how to find out. Only after researching this did I discover - to my horror and bafflement - that there is a version of the One without 4G. I was briefly worried I had managed to spend £400 on a lemon, but it seems I am able to use 4G if I force it.
Any ideas?