If you buy an iPhone in America, can you use it to get service in Japan?

And vice versa? I'm moving to Japan and i'm wondering if i should wait to go there to buy an iphone 5, but then they might not let me trade in my iphone 4 which is from America.

Only if its unlocked and the network band in japan matches the device's compatibility… And you should find someone in the black market willing to do a trade… Hope this helps.

Need an unlock code

If the iPhone is unlocked, then it will work overseas. But to be safe, buy the iPhone in country. Don't buy it here and then take it abroad.

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