If you need new iPhone, I recommend to buy it by Apple official store.
If you want used one, you can buy Ec sites or Real stores.
Then you have to ask the clerks “Is that Sim free?”
（Korewa Shimu Furi~ Desuka?) ”
|1. Apple official store|
|2. EC site (Amazon, Kakaku.com, etc)|
|eg) iPhone6 New: 52,000JPY~
iPhone6 Used: 30,000JPY~
|3. Real store (Janpara(じゃんぱら), Dospara(ドスパラ), etc)|
|4.Unlock at the carrier|
|If you already have a smartphone which is bought at carriers,
you can ask the carriers to unlock your smartphone.
If you have any questions, notice incorrect information or English,
please don’t hesitate to tell me below.