Where can i buy unlocked z3 dual

[Aaaaaaaa]

In which countries is it available and Will all models work in Sweden? 

[Thommo]

You could try direct from Sony or ask places that sell this item in your country if they are unlocked

[Uliwooly]

3G 850 / 900 / 1700 / 1900 / 2100
4G bands LTE 700/800/850/900/1700/1800/1900/2100/2600
(Bands 1, 2, 3, 4, 5, 7, 8, 17, 20)

It should work just fine

[1bit]

I purchased mine from:

http://www.eglobalcentral.co.uk/sony-xperia-z3-d6633-dual-sim-4g-lte-sim-free-unlocked-black.html

seller is based in Hong Kong delivered by UPS.