Where to buy my iPhone 5 from? I will be living in Canada for a while after 6 months. And returning to the UK regularly so I want an unlocked iPhone so I can use a local sim in Canada and a local sim in the UK to keep roaming costs down. But which model?

get the white one!

If you buy an iPhone at the UK or Canadian Apple stores, it should work on the GSM frequencies in both countries. LTE will not work as the LTE channels are different in each country and each iPhone sold in each country is only compatible on LTE channels of that particular country. Other wise it should be fine.

Be aware that only the Apple store (retail or online) sells the unlocked iPhone in the UK. I think the situation is similar in Canada. (It is in the US).

Here is the Canadian info

http://store.apple.com/ca/browse/home/shop_iphone/family/iphone5

Cheers

http://www.apple.com/iphone/LTE/

This will explain the LTE comments

As ar as the UK is concerned ONLY Apple Retail stores or Apple on line sell unlocked iPhones

No one else