Hi I am very confused at the moment... I live in the UK and bought my iPhone 6 (Model A1586, Part Number MG472B/A), Unlocked, direct from the Apple UK website. My previous iPhone was a 5 which again I bought direct from Apple and was never able to get a 4G signal, even though the 'Enable 4G' checkbox was available and enabled. Re: the iPhone 5, I bought (again direct from the Apple UK website - again Unlocked) was one of the first batches; and I do recall knowing then that the iPhone 5 wouldn't work on UK 4G networks as the radios were not compatible with UK 4G frequencies. Anyone who could confirm or deny this, it would be greatly appreciated. So I bought my iPhone 6 from Apple thinking that it would cover all UK 4G frequencies and I would easily be able to connect using 4G (my network is Three). According to the Three coverage checker - my house is covered with 4G - suggesting it should work outside without problem but inside buildings may be an issue. So one of the first things I tried was going outside in the garden and trying to get it to connect to 4G. Unfortunately, it is just not happening. I have tried (while outside), disabling both the 'enable mobile data' and 'enable 4G' toggles and re-enabling them in various sequences, and while a couple of times the 4G icon does show up, it only shows for a couple of seconds and then reverts back to 3G. I have checked on the Three website and Wikipedia and it looks like Three use the 800mhz and 1800mhz frequencies for their 4G network. I then checked the Apple UK website to see what frequencies the iPhone 6 supports (see the attached image taken from the Apple UK website - as their were too many to list). As I said above... my iPhone model is the iPhone 6 16GB Space Grey - A1586. Can anyone tell me from the information I have provided whether my new iPhone 6 that I ordered unlocked assuming it would work on 4G? I would assume the model I have is: Model A1586 (GSM): UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz) Would I be right? If so, does the 1700/2100 entry mean all frequencies between 1700-2100mhz? FYI: Three do sell iPhone 6's themselves that work with 4G. So unless they're doing something special with the phones they sell on their contracts to make 4G work.. I don't understand how 4G wouldn't work on my unlocked phone. Anyway - I think I have given enough information for someone to confirm or deny whether I should be able to get a 4G signal and use it. Many thanks for any advice offered.