Will an iPhone from Hong Kong work in the UK?

observe

Prices are substantially cheaper and I've a contact there who can get me one and ship.

Reading around, I'm a bit unclear on whether 4G will work. Does anyone know for sure or have done it?

macman

Even once you've paid the VAT and import duty?

bod1467

Putting aside the legal (tax) implications ....

http://en.wikipedia.org/wiki/LTE_(telecommunication)#Frequency_bands
http://en.wikipedia.org/wiki/E-UTRA#Frequency_bands_and_channel_bandwidths

If the HK version uses band 3 or 7 (at 1800 or 2600 MHz) then it'll probably work. Otherwise it won't.